I am continuing on my jet ski project that I cut open the rear to replace the waterlogged foam. Now I am moving on to the engine compartment. Maybe im over thinking this.. The interior of the hull was painted with zolatone (black with white spatter), this is the same paint used in the 1960's era to paint the inside of the trunks. There is a few areas that are unpainted from previous repair and where water/fuel sat and ate away the paint. I am having a hard time deciding what to do here. I could get another quart of zolatone, rent a pressure paint gun and spray it. That's a bit more than i'd like to do. Would it be safe to leave the hull unpainted considering it will be in salt water and sometimes fuel? It never sees sunlight. I think the hull was laid up with epoxy resin.

If not, I dont know what paint I could get that would be easy to apply. I was trying to find a 100% solids epoxy like what is used on garage floors. I think that would be the strongest/easiest paint to apply, but is expensive and no guarantee the zolatone won't react with it.

What would you do?

you could try auto paint and clear or just clear. idk enough about different resins but clear once cured wont be affected by fuel or salt water. 

you could try auto paint and clear or just clear. idk enough about different resins but clear once cured wont be affected by fuel or salt water. 

I would highly recommend painting the carbon because most resin absorb moisture and that affects the lamina properties.  There are tons of white paper on the subject that can explain it better than I can just google it.  Just know that water absorptions decrease mechanical performance of carbon fiber drastically.