I don't know how much you have to paint with POR-15, but it goes a long ways I got a quart & have done both inner fenders inside & out, radiator support, frame from the cab forward & both engine & trans cross members, and I still have 1/2 quart.
The person who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself." - John Stuart Mill (1806 - 1873)