underbody rust removal

Hate to be the barer of bad news but por15 doesn t work. Its hard as nails so it doesn t blister as easy so you don t see the rust bubbling. Strong stuff, but all it does is slow rust down. Only way to kill it is to blast, chemicals then topcoat to prevent future breakouts. Have a lot of experience with the product and procedures. It is great cause its tough. Has its place