Yeah, I've done two boats with epoxy and both sprayed and rolled gel coat on after reading the West data and it sticks great. I have waited for the epoxy to cure for a few weeks, washed and wet sanded, then used course sandpaper. No problems. Only used the jgreer epoxy so test first! Epoxy primer is a different animal though, might not work. Never try it directly over System 3 Quickfair, it will absolutely not cure.
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