Rust behind rocker panel
I have a 99 extended cab Ranger with the open rocker panels. It befuddles me that these chambers are open which allows the collection of mud, goo, etc. I am finding rust spots in there. I am contemplating curatives to stop the rust from eating my truck prematurely. The options that have come to my little pea brain include spraying oil, herculiner, permatex rust prevention, etc. I am curious what others have done to deal with this problem.