One of my cargo vans has a textured paint or sealer product on about the bottom 6-8 inches.. I believe this is to help prevent rusting.. I am wondering if anyone happens to know what is used for this? As I would like to do it to my other vans that are starting to rust on the bottom.. I know the rust will eventually eat right back through it once it has started, but I am just looking for a temporary fix to make my vans look a little more presentable..