There is the great non-corrosive, all natural cleaner I discovered several years ago called "adVanage" (Yes, that's actually the correct spelling). It is sold in concentrate and cleans tire marks, "cures" oxidized finishes, and is safe for indoor cleaning, as well. It is one of the best products I have ever encountered. There is a website for the product from which you can order... You can cut and paste this into your web browser. I think you will be pleased with this product.
Good luck!
www.advanage.com
Good luck!
www.advanage.com