On it, maybe . . . in it, no. Has to be the right kind of dirt to do any good. Red mud works pretty good, but I've found that limestone quarry dust works best . . . get it good and wet, pack it on, let it dry . . . it trys to turn back into limestone. Keeps all them chunks of rust firmly stuck together. Just make sure you wear safety glasses if you ever have to crawl under the car and bolt anything back on. :wink: :lol: