[Spridgets] Rustproofing sandblasted metal

[Mark J Bradakis]

Back in the day when I was actively doing car stuff, PPG had an epoxy 
based, I think, primer called DP40.  Actually, DP?? for various 
different colors, I think at one point point I had the blue, gray, light 
yellow and rust red colors on hand.  It was great stuff, expensive, 
professional grade, but most likely overkill for a couple of seat 
frames.  Your best bet might be Rustoleum rattle cans.

mjb.