Had to put in my two cents. I sandblasted my frame from my 59 and went with Zero Rust. After the chassis sat in my garage for about a month and a half I had to put it outside where it sat for eight months through the winter and not one spot showed even the slightest bit of rust. Still five months later and inside but looks as great as the day I finished painting it. My buddy and I did his roll off with Por-15 and 3 months of winter and rust was streaking all over the place. Yes the frame was sandblasted also. Next one I do will definitely be Zero Rust again. Just my opinion.