Aliphatic 255 paint (epoxy urethane) is $87 (!) a gallon--I would need about 3 1/2-4 gallons
Holy Cow! How thick are you going to put that stuff on? Most automotive paints will cover 200 - 250 sq. ft. per gallon or even more... over a well sealed primered surface (and that's putting on 2 coats). Just wondering?
You could just seal the whole thing with epoxy, then paint it with good automotive paint...
I have bought a lot of great paints including urethanes from these guys: http://www.smartshoppersinc.com/
You can buy top quality auto paints at wholesale prices from them.
Example: Kirker ULTRA-GLO ACRYLIC URETHANE UA-81535 - Winter White - $43. gal. with activator!
I get mine from RAKA, Inc., a 6 quart kit is $87.
These guys have epoxy for about $80. for a 2 gal. kit
Fiberglass Coatings, Inc.: http://www.fgci.com/
Or you could try these guys, 2 gal. (colors) kit = $96.
U. S. Epoxy: http://www.usepoxy.com/price2.htm
Hope this helps...