lacquer paint is single stage, no clear or hardener involed, just some good ol' lacquer and paint lol....as long as the paints not lacquer checked, meaning the finish has lil cracks in it, usually all lacquer jobs have this on them, mainly on the Hood, Trunk, and Roofs, mostly where the sun beat down on them the most, in that case, like i did, you gotta take it to bare metal, get all that lacquer checked paint off...no good if you paint or primer over that, it will eventually lift...then you epoxy the bare metal like i said b4....if your not seeing any checked paint, you can DA the whole car in 180, then follow with 320, then shoot your primer. The epoxy is a thick primer, so epoxied right over after i hit the whole car with 180, IMO that gives it a harder bite, than with 320, but most ppl like to 320 before they prime...so yes, you can epoxy prime over the existing paint