Pettit RustLok primer is amazing stuff. http://www.pettitpaint.com/catalog_b...asp?ictNbr=101

It can be brushed or sprayed, dries fast, and seals out moisture as well as an epoxy primer. It has excellent adhesion and is very resistant to chipping as well as chemicals. Even if you spill acetone or MEK on it, it will not lift.