Found it....
http://www.camaros.org/assemblyprocess.shtml#fisher
The sheet metal parts that got exterior color were pulled off the prime conveyor and loaded on another conveyor buck, in car position, for finish painting; it got a coat of primer-surfacer that was baked and lightly wet-sanded, then got three coats of lacquer, a short bake to "skin" it over, a light wet-sanding and wipe-down, then it went through the final re-flow oven at 275F for 30 minutes.