Interior painting time!
I agree with sloop. Just finished scraping and sanding and cleaning and scraping my boat. The previous owner had a mix of laminate faux wood in the main cabin and the ever popular carpet on the wall in the v-birth. What I did was applied several coats of a mildew resistant primer on the clean fiberglass. I had the added step of insulating and adding a facade, but then even that got the same mildew resistant primer. For the topcoat I used the afore mentioned bathroom and kitchen semi gloss because it is designed for moist environments and will also be mildew resistant. The added perk of this is since this type of topcoat is readily available, color matching is easy. Feel free to look at my album to see what I did. Good luck and have fun!
'78 Pearson 30, #1099