I'm working on a 17 ft garvey this time, and used System Three two part marine primer in light grey color. Very pleased with this as it sands well at a day or so, tougher than toenails at a week out. For paint you might look at Benjamin Moores Industrial two part M36-39 HIgh build Gloss. This is a polyamide epoxy with low odor, and is salt or fresh water immersable, mould resistant too.
I'm not quite ready to paint, another week or so, but I have researched this paint stuff for a while. They also have a water bourne M43-44, but The water immersion barrier was what really sold me, and about a thousand colors to get confused over.
Let me know if this looks like a good idea for you too, thanks, Cal.
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