Goodmark Chevelle Project Car - Part 4
After the body has been thoroughly cleaned and is free of dust and grease, the PPG Acid Etching Sealer can be applied. This stuff may look funny and seem like it's not covering the surface like other primers, but the simple fact of the matter is that it's not primer; it's a basecoat to lock in the bare metal from the atmosphere as well as to promote adhesion of the filler primer. Even catalyzed primers can let moisture through, causing rust you won't see until it's too late, making the Etching Sealer very necessary. View Related Article