Finishing up roof rebuild, just applied third coat of Kool Seal. Neat stuff. New skins on side boards I used blue metal, that is what I had. First planned to leave them blue but now thinking I want to apply Kool Seal to them also. I have enough left to do probably two coats on them. Don’t think this will cover the blue sufficiently to hide the blue. Should I maybe apply a coat of white primer and then the Kool Seal or do the Kool Seal and then paint if I need to?