Ditto on the SPI but get their black epoxy primer...EXCELLENT rat rod finish look and hard as nails - no top coat needed. For primer I use a $10 HF purple gun and it lays down very well. No reducer is needed though that will extend your dry times.
36 Chevy 1.5 ton - rusting away 52 Chevy 3100 - in progress 72 Chevy K20 - DD