S13 Rusted Underbody To Clean?
 

How can I get my rusted underbody cleaner? I want to get rid of most rust or some?

cut it out and re-weld..or fiberglass if its not a sturdy area to begin with

its rust man..you cant just wash it away

sandblasting is the only way to remove rust. after you sandblast it you can spray undercoating where you need it. no need to prime the spots where you sandblasted cause the undercoating will seal it up good. you will only need to cut and weld in new pieces if the rust has eaten through

If it's not that bad you could go to work on it with a wire brush and some Por 15. If it's rusted through, you need to replace metal.