For a basic "air dry", I do like the SEM primer. The guys that mentioned the "moisture cure 1-component" urethane in a spray can & mix/spray 2-component epoxy (I haven't seen that) are definitely correct about MUCH better durability vs. an air dry primer. fyi- urethanes will take sunlight, but epoxy won't + epoxy is much better vs. gasoline/alcohol chemical resistance vs. a urethane

70 Roadrunner convt. street car 440+6, NOS, 4-spd, SS springs '96 Mustang GT convt. street car '04 4.6 SOHC, NOS, auto, lowered "Officer, that button is for short on-ramps"