Hi Andy painted cars for 10 years painted my own boat 1st sand with 180 grit clean throughly with a automotive degreaser use DP 40 epoxy sealer (ditzler product) 1 even coat should be fine let dry for 1 hr no more than 24 hrs scotch brite after 24 hrs ready for paint i used ditzlers urethane, very tough easy to clean up bonami works great to take out scuff marks without dulling paint any questions fill free to e-mail me at dougk@omnipacking.com Good luck doug