I would try try to rid yourself of as much of the corrosion as possible. For surface rust, I used a heavy wire brush, then 80 grit, then dusted it off with a little hand broom, then apply.What steps would you take to apply Por 15 to an already-corroded chassis?
obviously just like paint prep is the key... whenever I paint anything after sanding I use a a product called metal-prep made by dupont. It etches the metal chemically and WORKS REALLY good. It is a water based product and you just wipe it on after you mix it with water 50/50I just purchased my 05 Colorado with
84000 miles. The undercarriage is very
Clean. Any suggestions on undercoating?