1971ford, I used rustoleum's rusty metal primer straight out of the can, I both brushed and rolled it, went on great, no runs, drips or error's, 1qt was more then enough. The the red brightside will cover it great. Mine was super rusty from age so I just used a power steelwire brush to knock down the bad stops and a good wash down with hot soaap and water followed by a wipe down to remove any remaining grease etc.