Hmm, I thin ceramic should go on unprotected paint as any other sealant can compromise the bonding if I'm not mistaken. I washed, clayed, iron-x'd, washed, compounder, polished, washed again and then ceramic coated. I also coated my rims with ceramic as it'll allow better cleanup and less brake dust will adhear to the rims.2020 about a week and a half old. It sat at the port of Baltimore for a few months though due to C-19 and the dealership had construction going on. I hit it with griots complete compound after a full panel clay bar. Im still iffy about the spray on ceramic waxes but everyone swears by them so we shall see. Im going to predict im going to strip off the ceramic wax in a few weeks, polish, wax (paste-griots), then seal it all in with 2 nice coats of the ceramic wax.