Rustoleum vs. POR 15 vs. others

I used POR on my kframe, but havent installed it in the car yet. I paid $15 for a small can and used what seemed like 3 tablespoons to cover it. The coverage is amazing and it goes on like glass. Chk out my resto thread for pics http://www.forabodiesonly.com/mopar/showthread.php?t=85673