We finally got a break from the roasting hot summer in the tent, so my painter showed up with a helper and covered the boat, taped off the mahogany toe rail, and sprayed what should have been the last coats of Imron MS1 clear coat.
The (reportedly) good thing about MS1 clearcoat is that with eight coats sprayed in two sessions, it needs no maintenance for five years even in the brutally hot sun of southern Florida. Spraying can also produce a very flat surface with terrific shine. But it takes a lot of work to get ready to spray.
As I walked around the scaffolding, I noticed a lot of junk in the MS1. At the bow, I noticed that the painter hadn’t switched the air line to the filtered supply. There’s a small filter/bulk water separator before the refrigerated air drier. But I have a Tee in the air line, with a valve that controls air to two outlets, one of which has a big Devilbiss filter/drier. The filters are expensive, so we only use that side for painting. The other outlet is used for air tools and blowing things off. But even though I positioned the supply panel with the filter up on the scaffolding, the painter didn’t switch the supply to the filtered side. I’m pretty sure the little bits of junk in the MS1 came through the air line. There are also a few spots where the paint gun dripped. And I found four pinholes (roughly 1mm diameter) that appear to go all the way to the wood.
This is frustrating. It’s expensive to pay a professional crew to come in and spray. I can’t understand how they didn’t see the pinholes when they were sanding and taping off the toe rail. Swapping the air line is something the painter has done many times since we sprayed the boat with Awlgrip. He knows what he’s supposed to do, he just got careless and forgot. And now I’ve got junk in the clearcoat. The drips could be sanded and polished, but with the pinholes scattered around the toe rail, he’ll have to sand and spray once more.
It’s always something.