I used POR 15 on my 53 truck frame, used a putty knife to get the scale off and then used POR 15 Marine Kleen as directed. This stuff is as tough as nails!!! I have also used it in the dump bodies on my dump trucks and its still holding up. I'm a true believer in this stuff!!!

A friend will bail you out of jail, but a real friend will be sitting next to you in the cell saying we really F*****up this time.