12. In the booth, John Morrow put down three coats of DuPont Epoxy Sealer/Primer. This stuff isn't porous like standard primer, so rust shouldn't be an issue, and it acts as a high-build scratch filler, which really helped to smooth out the little imperfections in the Camaro's flanks. The primer comes in gray, but it can be tinted, so John added about 10 to 15 percent black toner to the topcoat to darken it to our liking. The finish has that perfect eggshell sheen.