Hey everyone! First thread, just joined the forum. Recently purchased a project boat from a friend. It's a '79 Ericson 34T. He had started the remodel with his wife, then kids happened. So now my friend and I are taking over. This is the midship looking up just aft of the mast. I've read different articles on what these black spots are, and wondering if I can get some feedback here. You may also notice some cracks near the opening. We were going to throw a new ceiling treatment over this and continue with the remodel, but I've read that black spots like this could be a sign of deterioration of the fiberglass. I live in the PNW, and went into a local glass shop called Fiberlay. The guy in the store recommended sanding it with a 60 grit to roughen up the surface, then adding a layer of glass before giving it a ceiling treatment. So I guess I have three questions.
1. Is this of major concern as I already noted?
2. Is his repair work necessary?
3. Is there a insulation or vapor barrier I should put between this surface and the finished ceiling treatment?
Thank you!