I came across a product called " Liquid Metal " and then the labels were changed to " Plastic Metal " same stuff, different name. It comes in a tube for around 8 bucks. You can sand it, drill it etc. Easy as heck to work with. The stuff was great. All made up, no hardeners etc. Before I applied that I used " Rust-Mort " It stops rust from spreading. Hope this helps. Now that i found this product, its bye bye to bondo for me.