spray painted a bunch of boards, with a good prep job (sanded with eighty grit) i have been happy with krylon/rustoleum spray paint. Paint jobs have held up for ten years. Its all about the prep. If you want a thicker tougher paint look for engine paint, or bbq paint. Sprays a little thicker. Its all about the prep.
Epoxy paint is much different than epoxy glue. But still not necessary for a board.