thanks for the links on the spray on foam, may check in to using it on the boat. I have seen a spray on rubberized product used for car undercoating, an Eastwood Auto Supply product, don't know if it would work to insulate, but easy to spray on. The product can be painted, comes in black, and adheres to fiberglass. I was thinking the rubberized coating would be enough to provide a thermal barrier to prevent the condensation on the hull. The product can be sprayed or comes in a brush on form too. The product would be easy to control where you want to apply the finish. You could paint it too.
What do you think?
Thanks, I really do love the Islander 28 inside and out! It's a good thing too, cause I'm putting in lots of hours fixing problems inherited from years of neglect by previous owners. Above the stove is an old small florescent light, I actually like the light, it's not an obnoxious as most florescent lights, it was there when I purchased the boat.