MM, I had to replace the deck from the cabin door to the front of the fishbox (84 cuddy) and repainted my deck with Glidden Porch Paint (enamel).
this is the only shot i have forward, can't see much but it came out ok. the bad thing is i have to lightley sand & repaint every 3 0r 4 years. Old School has used garage floor paint on decks he as redone. i tried to use a lighter color so the deck would not get so hot, but have gone back to the original wellcraft color now, you can see in the pic how the traffic areas wear through.