Originally coated mine with a rubbery spray-can coating, similar to Bedliner. It held up well underneath, but flaked off on the sunny/rainy side (top). Got Behr extra-textured paint at HD, which is only about $35 a gallon. Marine deck paint is over $100 per gallon. BEHR PREMIUM Extra Textured DECKOVER Coating There is a foam roller recommended. It comes out of the can very thick so spring for the foam roller. Pressure washed the old finish off, then used a wood cleaner and scrub brush. Let it dry in the sun for a day then applied the Deckover. Put the first cost on too thick: put on just enough to cover and recoat. Had just enough to do the top 4x8 with two coats. Nice grainy surface. Most Behr paint sucks but had it on for a year and it’s holding up really well.