All my major rust spots are gone! nw just that surface rust to deal with..... All spots that had blistered under the floor have been treated with a rust inhibitor called Rust Mort...WORKED great! Then fiberglass several layers of thick fiberglass matting were placed over the spots and hardened with fiberglass on top. It is rock hard no...all the leaky spots have been fixed...I know the engine will last another 6-10 years...I hope the body will to...spray rubberized undercoating his been applied to the undersides of the repaired areas to inhibit moisture and is will be reapplied every 6 months...I will get some pictures up soon...only problems now are some surface rust in the back floor pans under that stupid matting that his cracked The back matting in your passenger compartment crack too? I am scraping off the cracked areas and applying rust or sanding off the surface rust. I hope this work pays off because it looks great!