Re: Spraying gelcoat
Mast: that's a great write of the process, thanks for the link. It will definitely help
PorFin: Thanks for mentioning MaineSail's excellent how-to. I have seen it but it actually didn't occur to me to try to bring back the original gelcoat on deck. I'll be down at the boat next weekend and take a closer look with an eye towards refinish.
I suspect that most of it will respond well as you suggest. Most of the gelcoat is still quite good. However there are a few areas, particularly in the cockpit, that seem particularly worn. Specifically there are areas that appear to have small pinholes, and these invariably collect dirt and whatnot. I might just do a little hand sanding/compounding in those areas to see if it can come back.