Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.
I think you may find more info under the Behr thread, but I did the under carriage using a spray gun and used 1/2 gal, so whole truck I would say 2 max. Also depend on how you put it on, Spray, Brush!
Good Luck!