1969 Chris Craft Roamer 46 Refit: Fiberglassing the “Throne Room”

It’s been so hot in the tent that progress on the Roamer has slowed to a crawl. I’ve been tempted more than once to just cut the plastic off, but it’s way too soon. I’d just be making more problems for myself. So one workaround is to start very early in the morning, have lots of fans moving humid air around, and drink water…lots of water. But then we got a brief break from the heat wave. With the obligatory whining out of the way, I got the V-berth head walls and floor fiberglassed and hot coated with fairing compound. Just in time for the heat wave to return this week.

yay

Head liner material

Looks like a future sticky mess to me!

First, we cut all the fiberglass pieces to fit the complex shape of the V-berth head, then the fun began. But once the epoxy gets mixed, there’s no time to take pictures. Even when it’s only 85°F outside, inside the tent it’s hotter and the epoxy starts to kick pretty fast. So one guy is rolling epoxy on the walls while another is brushing into the corners. Another guy is out in the salon mixing up the next batch of epoxy. Once a wall is wetted out, in comes the 1708 biaxial fiberglass and more epoxy.  Two guys in that head with the walls wetted out with epoxy…not something I ever want to do again. Tyvek suits were a requirement, which just makes the heat and humidity worse. Even with the big fume extractor running, it was pretty miserable. But we got ‘er done.

Fiberglassed and faired

Fiberglassed and faired

We used the same hot coat process for the fairing compound as we did for the bullet-proof cabin top. The fairing compound is a homemade mix of epoxy — the same West System we used for the fiberglass layer — thickened with fumed silica and glass bubbles in a 30/70 ratio. When we did the cabin top, we had to wait up to an hour for the fiberglass epoxy to set up enough so we could apply the fairing compound. If you try to apply the fairing compound before the epoxy starts to kick, it just pulls the fiberglass out of position. But this time, it was so hot that the epoxy was blasting past the tacky phase really quickly. We had to scramble to get the fairing compound on before the cure advanced too far.

What a sticky mess

What a sticky mess

It’s sticky and messy, but hot coating is the way to go, since it saves having to grind the fiberglass to apply fairing compound. Anybody who’s ever taken a grinder or sander to fiberglass knows how miserable that is. Plus, grinding breaks the fibers, which weakens the FRP matrix. Another benefit of hot coating is that you get an epoxy-epoxy chemical bond between the fairing compound, the FRP matrix, and the wetted out substrate, which is superior to the mechanical bond you get applying fairing compound over a sanded or ground surface.

Done

Almost done

After the walls were all coated with a light layer of fairing compound, we applied a piece of fiberglass to the throne dias and floor around it, faired that, then laid on the last piece for the entryway, which is also the shower floor, and faired that. Lotta work, but we got ‘er done.

Next up in our 1969 Chris Craft Roamer 46 Refit: Fairing the “Throne Room”

1969 Chris Craft Roamer 46 Refit: Installing the Aft Head Ceiling Panels (more fillets!)

With the aft stateroom head walls fiberglassed and faired, the ceiling panels cut, fiberglassed, and faired, and the overhead wiring done, the next step is to install the ceiling panels, prime, and prep for paint. What we’re ultimately going for here is a nearly waterproof unit bathroom, in which the ceilings and walls are fiberglassed together, like an oversized shower enclosure.

1/4" marine plywood, fiberglassed and faired

1/4″ marine plywood ceiling panel that’s been fiberglassed and faired

It’s a lot easier to do flat fairing work on a table than it is overhead, but the epoxy, fiberglass, and fairing compound make these panels heavy and awkward to move around.

Panel 1 in place

Panel 1 in place

I didn’t have time to take pictures with sticky epoxy in play, but prior to installing the panel I wetted out the top side of the panel with epoxy, then applied epoxy thickened with wood flour and cabosil to each overhead frame. With a little help from a friend, I marked off the overhead frames and countersunk the screw holes before fastening the panel in place with stainless screws.

Panel 2 in place

Panel 2 glued and screwed in place

Corners and panel edges are glued and screwed all around

Corners and panel edges are glued and screwed all around

The joint between the panels will get a strip of fiberglass

The joint between the panels will get a strip of fiberglass

Thickened epoxy topped with wetted out fiberglass mat

Thickened epoxy topped with wetted out fiberglass mat

Edges get a strip of FRP, too

Panel edges get a strip of FRP to the longitudinal mahogany beam, too

Home-made epoxy fairing compound is hot-coated over FRP

Home-made epoxy fairing compound is hot-coated over FRP

It’s a lot easier to hot-coat tacky fiberglass with homemade fairing compound made of the same epoxy + a 70/30 mix of 3M microballoons and cabosil than it is to sand cured fiberglass and apply fairing compound. Hot-coating saves a really miserable step in the process.

After sanding the fairing compound, it's fillet time!

After sanding the fairing compound, it’s fillet time!

I do love my fillets. Seriously. Can’t get enough of ’em. Awlfair is a great product for fillet work, and it sands pretty easily, too.

Once the Awlfair sets up, we’ll hit it with Awlquik, sand, then Awlgrip 545 primer, and then final sand before painting with Eggshell Awlgrip.

Next up in our 1969 Chris Craft Roamer 46 Refit: Prepping the Aft Head for Paint.

1969 Chris Craft Roamer 46 Refit: The Helm Station Windshield Frame

When I last wrote about that bloody windshield frame, things were not going well. While it looked great outside, the frame fit very poorly to the boat. If this was a typical Chesapeake crabber’s boat, a 3/8″ gap between the windshield frame and the hard top might not be a problem–just fill ‘er in with urethane sealant. But since this isn’t a work boat, I wanted (and paid for) a frame that fits. When the fabricator declared he’d do no more work on the frame, I had to call in my Boatamalan* painter to fix the southern Maryland fabricator’s handiwork.

* Boatamalan = joking portmanteau referring to the Central American origin of the fairing crew and painter (boat + Guatamalan). In fact, the Boatamalans are mostly from Honduras, but Boatduran doesn’t roll off the tongue like Boatamalan does. 🙂

Here’s what we’re dealing with:

3/16″ irregular gap at the port side bottom

Starboard upper corner was waaaay off

One of three high spots contacting the hard top

Zero contact at the port-side inner upright

Brand new Awlgrip got dinged up

The paint getting scratched really added insult to injury, since tape is cheap and I put a whole case of it out for the fabricator to use when the tape needed replacing. Instead of spending five minutes replacing tape, he let it get worn out and then got sloppy installing the frame (over and over again because it didn’t fit right because he welded it together off the boat). Sheesh

More dinged up paint on the port side

Swiss Cheese from all the holes the fabricator drilled

Swiss Cheese from all the holes the fabricator drilled…and note the scratched paint

More Swiss cheese...too many holes!

More Swiss cheese…too many holes!

Also in the pic above, note the chip in the brand new Awlgrip paint that would be visible above the windshield frame. The fabricator’s proposed solution: “Cover it with urethane sealant.”

Sheesh…whatever happened to “American quality?”

We’ll see if Boatamalan skills and an amateur American boat refitter can put some quality back into the job. 😉

The repair process begins with blue tape and a grinder

The repair process begins with blue mold release tape and a grinder to knock down high spots

Same on the starboard side

Blue mold release tape on the frame

Blue mold release tape all across the frame

Blue mold release tape covering the top and bottom contact areas of the frame

1810 fiberglass will fill the gaps

Heavyweight fiberglass will fill the gaps

1810 'glass cut into strips

Wetting out the fiberglass mat

Wetting out the fiberglass fabric

Epoxy fairing compound tops the frame, followed by wetted out 'glass

Epoxy fairing compound tops the frame to fill in any imperfections, followed by wetted out ‘glass

The fairing compound is the same homemade stuff we used when we faired the cabintop. It’s epoxy thickened with a 70/30 mix of 3M glass bubbles and cabosil.

Top the first layer with more fairing compound and another layer of 'glass

Top the first layer with more fairing compound and another layer of ‘glass

Areas with big gaps get a 3rd layer of 1810 'glass

Areas with big gaps get a 3rd layer

Top the layers of fiberglass with another layer of fairing compound

Fairing compound on the lower frame landing will fill the gaps there

Fairing compound on the lower frame landing will fill the gaps there

Ready to slide up in place

Ready to slide up in place and fasten

 

Nice fit at the top starboard corner

Nice fit at the top starboard corner

Good fit along the bottom

Good fit along the bottom

Looking good at the uprights

Looking good at the uprights

On the inside, no more high spots

On the inside, no more high spots

Huge gaps? What huge gaps?

Huge gaps? What huge gaps?

Good contact all the way across the top

Good contact all the way across the top

100% contact all the way across the top and bottom should eliminate pressure points that are prone to cracking

With the sticky epoxy dripping everywhere, we slowly backed away from the helm station and let everything cure. Time will tell if the plan works… 😉

Next up on our 1969 Chris Craft Roamer 46 Refit: The Helm Station Windshield III

1969 Chris Craft Roamer 46 Refit: Fillets On The Hard Top

Breaking open the Awlgrip paint job was tough, but it was the best way to resolve the problem caused by thieves stealing my drip rails (and a lot of other stuff) back in May 2014. With the paint ground back on the joint between the top and bottom halves of the hard top, and new fiberglass and fairing compound laid over the joint, next we sanded the fairing compound and used fillets to smooth the edge.

First, sand down the fairing compound

First, sand down the fairing compound

The great thing about hot-coating home made epoxy fairing compound over fresh fiberglass is that you don’t have to get itchy twice. Sanding the fairing compound is much easier than grinding on fresh fiberglass (thereby weakening it) and applying fairing compound over that.

Gotta love fillets

Gotta love fillets

Awlfair is a great product for fillet work. And on this project, we’ve done lots of fillets.

Next day, sand the fillets smooth

Later that day, after the Awlfair kicked, we sanded the fillets smooth

Next day, we taped off the boat and sprayed Awlquik

Next day, we taped off the boat and sprayed Awlquik

Bad lighting, good fillet

Bad lighting, good fillet

Without a drip rail, rain will tend to drip from all over the hard top, but I’m OK with that. One thing I’ve noticed is that boats with drip rails tend to get very nasty drip lines at the spot where all the rain drips off. This may not be a problem with boats outside of urban areas, but mine will definitely be an urban boat, and all of the dust that settles on the boat and gets washed off by rain will be evenly distributed now that I don’t have a drip rail.

That’s my theory, and I’m stickin’ with it. Gotta see a bright side in this whole theft thing somehow… 🙂

Next up on our 1969 Chris Craft Roamer 46 Refit: The Helm Station Windshield Frame

1969 Chris Craft Roamer 46 Refit: Aft Stateroom Head Walls

I installed the aft stateroom bulkhead and main walls back in March and April, which was one of many big things that must happen if we’re going to splash the Roamer in the fall of 2015. The windshield saga may put a hitch in that plan, but I’m going full steam ahead on other things while I work on a resolution for the windshield problems.

After getting the aft stateroom walls installed, my Boatamalan painter asked why I don’t make the aft head into a giant shower: basically, fiberglass and fair the walls and ceiling, then bond the ceiling to the overhead frames and fillet the corners. Then, prime and paint with Awlgrip. You end up with a monolithic room with no cracks or seams for water vapor to hide in and support mold. They do this on the showers in the multimillion dollar sportfishermen that the Boatamalan makes at Weaver Boatworks (his day job), though their showers are much smaller than my aft head. I figure what’s good enough for a multimillion dollar Weaver boat ought to be OK for a Chris Craft Roamer refit.

Expensive little pile of materials

Expensive little pile of materials

1810 biaxial fiberglass, a roll of Floor Guard (the blue corrugated plastic), four rolls of masking film, a bucket of wood flour, a gallon or two of epoxy resin, hardner, and some fancy-schmancy filler…$1800. A small price to pay for a bathroom that’ll make the missus happy. By the time we add in the Awlquik, 545 primer, and Awlgrip top coat (in an off-white eggshell color), reducer, and catalyst, materials for the aft head total $2500.

This AlexSeal product is the only fairing compound to use in showers

This AlexSeal product is the only fairing compound to use in showers

The Boatamalan says other fillers–even Awlfair–can end up having problems years down the road in a shower application. The Alexseal product, while eye-poppingly expensive, is worth every penny since we’ll never have to do it again.

Roamer bathroom w/jet bath > Weaver multimillion dollar boat w/shower

Roamer bathroom w/jet bath > Weaver multimillion dollar boat w/shower 🙂

The challenge is, we have to fiberglass, fair, prime, and paint in a small boat bathroom (relative to your average house bathroom) while the jet bathtub is in the space. Taping off the tub with Floor Guard and setting it up on end out of the way, the Boatamalan hit the bulkhead and walls with the sander. In retrospect, if we’d thought of this approach earlier, we should not have beautifully finished the interior walls of the head with ICA base coat clear. It all got turned to some very expensive dust in preparation for fiberglassing the walls.

First layer of 1810 fabric applied at the top

Sanded with 36 grit and ready for epoxy and 1810 biaxial fabric

First layer of 1810 fabric applied at the top

First layer of 1810 fabric applied at the top

Second band of 1810 applied down to the floor

Second band of 1810 applied down to the floor

Looks like a good place for a fillet

Looks like a good place for fillets

I’m a big fan of fillets.

Skim coat of fairing compound

Skim coat of fairing compound

Once the epoxy was tacky, we hot-coated it with home-made fairing compound using the same epoxy and a 70/30 mix of microballoons and cabosil to a stiff, whipped cream consistency. We did this when fairing the exterior as well, since it puts a layer of fairing compound between the sand paper and the glass fibers in the FRP matrix when the fairing process begins. The strength of FRP is in the fibers, so not breaking them makes for a stronger finished product.

Bulkhead wall coated in fiberglass, epoxy, and fairing compound

Bulkhead wall coated in fiberglass, epoxy, and fairing compound

That’s a wrap for Step One in the aft stateroom bathroom. I’ve described before the complex order of operations for this refit, where seemingly unrelated and even trivial stuff has to get done before a bigger thing can get done. The order of operations as of right this second is:

Sand walls
Apply Alexseal fairing compound (wait to cure)
Make ceiling panels (1/4″ marine ply, FRP & fair inside surface)
Insulate ceiling between frames (spray foam)
Sand Alexseal fairing compound smooth on walls
Install wiring for overhead lights
Epoxy back-side of ceiling panels and install (glue and screw to overhead frames, fiberglass joints, and fair)
Sand joints and make fillets
Sand & apply Awlquik
Sand Awlquik and apply 545 primer
Final sand 545 and spray Awlgrip topcoat in eggshell white

Since I’ll be spraying insulation to get the bathroom ready, I might as well do the rest of the boat, too. I’d like to have all of this done by July 1, when I plan to start on mechanical and get the engines finally installed. Busy, busy, busy…I need to quit my day  job! 🙂

Next up on our 1969 Chris Craft Roamer 46 Refit: Aft Stateroom Head Walls II

1969 Chris Craft Roamer 46 Refit: Final Prime Coat on the Hull

For the first time since February 2009, last night I packed away (hopefully forever ;-)) the leftover cabosil and 3M microballoons we used to make fairing compound, the Awlgrip High Build and Awlquik primers, all grits of longboard sandpaper and everything else having to do with fairing. We’re done with it. All that’s left to do on this paint job is cover the boat and spray the hull with Awlgrip 545 primer, then sand, cover the boat again and spray “the shiny” Awlcraft 2000 Matterhorn White. What follows are the steps between my installment of final longboarding the fairing compound on the hull and now.

Taped up the backside of the engine room vents

Plastic and tape stick very well to fresh primer

With the aft stateroom windows all freshly painted, it was much easier taping off the windows in preparation for spot priming with awlquik sprayable fairing compound.

Et voila! Awlquik sprayed!

The white areas are the Awlgrip 545 we put on the hull back in 2009. The yellow is the new Awlquik for areas that were still a bit too wavy.

Out came the longboards one last time

Out came the longboards one last time

We used 220 grit Mirka sandpaper on 36″ boards to do the final fairing sanding. At this point, with a couple of patches to the Sharkskin plastic covering the parts of the boat that are already painted–the cabin top, aft enclosure, and non-skid on the decks–the hull is fair and ready for Awlgrip 545 final primer.

Et voila! Final primed in 545!

Et voila! Final primed in 545!

She looks very good sprayed all white again.

This weekend, if all goes as planned, we’ll sand the 545 with Mirka Abranet 320 grit, then blow off the dust, pull the dusty old plastic, wash the boat and tent, then cover everything again and spray “the shiny,” as the Chief Boatamalan* painter calls it. I’m off to the boatyard!

Next up in our 1969 Chris Craft Roamer 46 Refit: Final Sanding on the Hull

*Boatamalan: portmanteau indicating highly skilled boat workers of Central American origin. ;-)

1969 Chris Craft Roamer 46 Refit: Longboarding and Final Touch-ups on the Hull

With the exhaust system out of the way (for now), we focused on final longboarding and other detail work on the hull. Since I don’t want to make any cuts in the paint once it’s done, this means I have to drill out all of the holes for hardware and tap as necessary. For other holes in the hull sides, like thruhulls, I used an air deburring tool to remove excess filler. Then I applied Awlgrip Max Cor CF aluminum primer to the bare spots of aluminum inside the bores. This should help ensure that there is a continuous coating film from the coatings inside to the outside paint job, which in theory should help reduce the possibility of aluminum oxide forming and creeping under the paint, causing it to fail prematurely.

Stbd nav light cutout

Stbd nav light cutout all cleaned out

aft bilge and shower pump thruhulls

Main engine room bilge pump outlet.

Stern light cutout

The original stern light was made of chromed pot metal that had corroded. I found a good, proper vintage replacement on ebay that was chromed bronze rather than pot metal, but it turned out to be slightly larger than the original. So it took quite a bit more work with the deburring tool to open up the cutout so it would fit. Once it was big enough that the light fixture would fit, I had to make it just a wee bit bigger in all dimensions to account for the thickness of the primer and paint we’ll apply.

Because aluminum oxide forms immediately when aluminum is exposed to atmospheric moisture and builds up over time, I wanted to reduce the amount of time the aluminum was exposed. As soon as I finished opening up each hole, I brushed some Max Cor CF inside.

Awlgrip Max Cor CF in each hole to protect the aluminum

Awlgrip Max Cor CF in each hole to protect the aluminum

Low spots on the hull got a touch of fairing compound

Low spots on the hull got a touch of fairing compound

There were a dozen or so low spots we found when longboarding the hull, which we initially faired back in 2009. So we mixed up a small batch of homemade epoxy fairing compound thickened with cabosil and 3M microballoons. The base coating is Awlgrip 545 white that we applied in May 2009, so you can see the filler in the pic above and below because it’s slightly yellow from the 4:1 fast hardener we used.

A few more low spots at the bow

A few more low spots at the bow

The flare of the bow had a low spot along a weld

Former port exhaust hole

Former port exhaust outlet hole

Former stbd exhaust outlet hole

Former stbd exhaust outlet hole

Now all we have to do is longboard the patched areas and apply some Awlquik sprayable fairing compound in spots. Once that’s longboarded smooth, we’ll be ready for the final coat of Awlgrip 545 primer. Gotta move on this…summer is over and the cold winter is coming.

Next up in our 1969 Chris Craft Roamer 46 Refit: Aft Stateroom Windows

1969 Chris Craft Roamer 46 Refit: Exhaust III, Decommissioning the OE System

Today I’m documenting the final step of the major exhaust system work: yanking out the old system. While it might seem like I’m jumping around unfocused, messing with the exhaust before the hull is painted, the simple fact is that I don’t want to cut, grind, drill or use epoxy resin around anything that’s already painted with “the shiny.” The exhaust system had to be done before we put the last coat of Awlgrip 545 primer on the hull. If the mechanic I fired in July 2013 had installed the engines as promised back in September 2012, I wouldn’t be dealing with this now.

The OE exhaust system consisted of two 15-foot sections of 5-inch Schedule 40 pipes welded in from the transom to the engine room bulkhead. Inside the ER, there were two large steel “suitcase” mufflers, all of which had pretty much rotted out after 15 years of service. When we got the boat in 2007, she’d been on the hard since the mid-’80s. She’d only been running on the water for a decade and a half before ending up on purgatory row. So, rather than just go with the exhaust system that Chris Craft used, which obviously had its shortcomings, I wanted to do something better, longer lasting, and quieter. The factors that led me to go with side exhaust and waterlift  mufflers were:

Noise reduction–I’ve always had Detroit-powered boats and the sound of the exhaust was something I used to like…but not for long days at the helm. Even my other boat–a 1968 427 Ford-powered Commander 42–sounds wonderful…for about 15 minutes. After that it’s pretty much just noise. Granted, the Cummins 6CTAs in the Roamer will be a lot quieter than Detroits, but they’re hardly quiet. The waterlift mufflers are going to make for a quiet ride. In solving one problem though, another pops up.

Backpressure–I’d have to run 15 feet of 8″ pipe out the back on each side to get the backpressure where Cummins wants it. By going out the side and using an auxiliary raw water outlet so it doesn’t all have to go through the muffler, I can stick with a 6″ system and keep the backpressure down.

Space– the OE 5″ pipes took up roughly 12″ of width from each side of the aft stateroom. 8″ pipes would have pushed the wasted width to about 30 inches, and the pipes are 18 inches above the aft stateroom floors. When you add in air space around the pipes, you lose a huge amount of storage volume by running the exhaust out the transom. And finally,

Bang for the buck–the price delta between 6″ exhaust parts and 8″ is significant.

While taking out the old exhaust system, I found some more reasons why long aluminum pipes out the transom weren’t such a great idea.

Transom exhaust hole

Transom exhaust hole

In the pic above, you can see the “pipe within a pipe” consisting of the original 5″ exhaust pipe with the 3.5″ replacement I installed inside it for the Lehman 120 engines I originally planned to use for the boat. Let me know if anybody’s interested in some nearly new 3.5″ 6061 aluminum pipe…or some Lehman 120s with Twin Disc MG-502 gears.

Aluminum patch cutting

Aluminum patch cutting

One very nice thing about aluminum is that you can use common woodworking tools to cut it. I do find, though, that metal cutting jigsaw blades last longer than ones intended for wood.

Grind, tack and weld

Grind, tack and weld

My Miller Trailblazer 280 and Spoolmatic 30A worked real well for welding the patches in.

Port patch done

Port patch done

Starboard patch done

Starboard patch done

Old pipes out the window

Old pipes out the window

Next!

Next!

I used a carbide blade on my beater Skilsaw to make the initial cuts to get the pipe down to a manageable size, since carbide cuts through aluminum like a hot knife through butter. Then I followed up with my Harbor Freight sawsall to finish the cuts. The HF saw is noisy, but what do you expect for $20? With good Freud blades it does a good enough job and is still going strong after 7 years.

Incidentally, the pic above shows the half of the pipe that’s still connected to the boat at the engine room bulkhead. It’s also connected to the hull frame at the cut point. Since that welded brace midway along the pipe is behind extensive cabinetry with the original interior and the OE fuel tank, it’s got to be a really big job gaining access if you ever have to…say…replace a rotten pipe. You can’t just cut the two ends and pull the pipe out the transom.

OE exhaust is out

OE exhaust is out

Extensive pitting in the OE exhaust pipe

Extensive pitting in the OE exhaust pipe

The shot above shows the interior of the exhaust pipe that was welded to the ER bulkhead. The pipe is rotated so what was the bottom is on the right side in the pic. You can see the extensive pitting in the metal, especially where raw water would have been flowing when the engines were running. My theory is that the aluminum was attacked by copper ions from the exhaust risers on the Super Seamaster twin turbo engines that I pulled out of the boat back in 2008. Some of those pits looked extremely deep…

White spots on the outside?!?!?

White spots on the outside?!?!?

Like the rest of the hull, Chris Craft coated the exterior of the exhaust pipes with bitumastic and silver paint. Out of curiosity, I looked at the outside and noticed three spots where there was a wee bit of white powder, AKA aluminum oxide, which is what aluminum turns into when it corrodes.

Houston, I think we've got a problem.

Houston, I think we’ve got a problem.

My steel pick when straight through the pipe with very little effort. One of the holes was big enough to put a 1/4-20 bolt through it; another was big enough for a 3/16″ screw.

Auxiliary exhaust ports?

Auxiliary exhaust ports?

When I saw this I had to laugh, thinking back to the fellow who sold the boat to me when he said all it needs is engines and a paint job.

With the OE exhaust system off the boat and the new side exhaust flanges at the paint shop, I focused on wrapping up the final work to get the hull ready for “the shiny.”

Next up in our 1969 Chris Craft Roamer 46 Refit: Longboarding and Final Touch-ups on the Hull

1969 Chris Craft Roamer 46 Refit: Exhaust II

After working out the method on the port exhaust flange, making the second one was much quicker on the starboard side.

Hull is ready for the flange.
Hull is ready for the flange.
First, cut circles of 1810 biaxial
First, cut circles of 1810 biaxial

I’m using four layers of 1810 biaxial for the flange. Since the Centek exhaust components appear to be no thicker than one or two wetted out layers, the exterior flange should be the toughest part of the assembled piece.

My Weiss shears make the cutting easier
My Wiss 1225 shears make the cutting easier

These scissors make a world of difference when it comes to cutting tough fabrics. They look like they’ve been through a big boat refit, but they’re still cutting well…even after chewing through that Kevlar we used to make the bullet proof cabin top.

The system will eventually look sorta like this
The system will eventually look sorta like this
Wetting out the 1810 biaxial for the flange
Wetting out the 1810 biaxial for the flange

Once the fiberglass is fully wetted out, I lift it into place on the hull. I’ve already put the blue tape around the hull opening and applied mold release wax carefully to it so the finished part will pop off easily.

Two layers down, two to go.
Two layers down, two to go.

I wrapped the flange layer inside the pipe on the bottom. On the top, where the pipe sticks out a bit, I applied another strip of wetted out 1810 on the inside that extends out and joins with the outer layer. The finished part should be quite robust.

Once again, I hot coated with homemade fairing compound.

The fairing compound is the same US Composites 635 thin resin thickened with a 1:3 ratio of cabosil and microballoons that we used elsewhere on the boat.

Initially I liked US Composites epoxy, but the more I use the stuff the less I’m impressed. While their 4:1 fast hardener will smoke in the pot in no time on a hot day, it takes way too long to set and a whole lot longer to cure than West System. With US Composites, you can sand the fairing compound the next day IF it’s warm enough overnight. With West in identical conditions, you can start sanding in two hours. If I had to do it all over again, I would have saved a ton of time and money and just bought a barrel of West resin from the start.

The one plus point for US Composites is that if you’re wetting out plywood edges or otherwise trying to seal up a piece of wood, the fact that it takes forever to set and cure seems to allow it to wick in further than West. That’s just a guess though.

Anyway, the following day I popped out the two flanges and continued fitting them.

Nice fit to the hull curve
Nice fit to the hull curve

Before popping the parts off the hull, I drilled the holes so the flanges would bolt up exactly as they were molded. Even without bolts holding the parts in place, they fit right up to the hull.

Nice fit but kinda furry
Ground to a rough finish and ready for the Boatamalans

I used a 5 gallon bucket to trace out the circle…the same bucket I used to outline the 1810 fiberglass fabric. Then I hit it with a grinder and sanded back to the line.

New exhaust system is roughed out.
New exhaust system is roughed out.

I need to weld up some 6061 angle and make a platform for the muffler, but otherwise the exhaust system is ready for the paint shop.

Next up in our 1969 Chris Craft Roamer 46 Refit: Exhaust III, Decommissioning the OE System

1969 Chris Craft Roamer 46 Refit: Final Awl Grip 545 Primer on the Aft Enclosure

Summer was long and hot, which made it virtually impossible to continue with the paint work on the boat. Once we hit August though, temps dropped to the point of being almost unseasonably cool. The goddess of the seas, who I believe has a soft spot for old Chris Craft enthusiasts, was finally cutting me some slack–temps inside the tent were perfect for painting. We took advantage of the break and sprayed the aft enclosure with the final coats of Awl Grip 545 primer.

We initially planned to spray the 545 on the aft deck in May 2013, the weekend after we sprayed the last coat of Awl Quik. But my mother-in-law passed away, then June came in like a blast furnace, followed by all of the work on the aft enclosure coming to a stop when I discovered that the SMIB fabricator who built the enclosure had put a wee bit of twist in several of the panels. It was late July before I finally solved the problem of how to put flat windows into slightly twisted window frames.

Anyway, in the spirit of “better late than never,” it was good to finally get the final primer on the stern.

Finally! Smooth Awl Grip 545 covers the aft enclosure.

The cockpit aft panel turned out very nicely.

With uniform white primer over the whole enclosure, it looked like the time we spent making fillets and fairing the seam where the panels were stitched together was well worth it.

Window frames are looking good.

Chris Craft used a hard inside corner along the curving line at the aft end of the hard top, both of which were cracked on this boat. We ground out the cracks and did a proper fiberglass repair with fillets to reduce stress in the area. I think they look much better than hard corners, too.

Crack repair and fillets look good (upper left corner of the pic above).

Fiberglass window frames integrated nicely into the aft enclosure.

Fillets smooth out the joint and add a nice touch.

Awl Grip 545 on the underside of the hard top.

If you look closely, you can see that even the 545 has a bit of shine to it. The guys did a great job making this all very smooth and uniform. If it shows this well in primer, I can’t wait to see it painted with Awl Craft 2000 Matterhorn white! 🙂

The hatch hole on the bow deck

We found that the area immediately around the hatch on the bow did not follow the smooth crown of the deck. It was slightly lower than it should have been, which would have caused water (and dirt) to collect around the hatch-to-deck seal rather than running off as it would with a proper crown. We applied a bit more of the home-made epoxy fairing compound made from US Composites thin resin thickened with Cabosil and 3m Microballoons in a 1:3 ratio to build up the deck, then longboarded it fair and sprayed Awl Quik before applying the final 545 primer.

Ready for final sanding!

The black paint is a guide coat for the final sanding. Using Mirka Abranet 320 grit disks, we only sand enough to remove all of the black paint. This avoids the problem of putting divots in the faired surface by sanding too much with the dual action sanders. The black paint also helps show pinholes and tiny low spots.

With 545 coating the aft enclosure, helm dashboard and bow deck, we’re ready for final sanding and then paint.

I’m all giddy. 🙂

Next up in our 1969 Chris Craft Roamer Refit: Shiny Mahogany Moldings on the Aft Enclosure.