I was introduced to the product at a filling station where someone had a Dri Wash 'n Guard metallic sign on his car and asked me if I would like to see how it works. Had a minute and challenged him to remove some surface scratches that I hadn't been able to get out. When he did this small area and succeeded to not only remove the scratches but give the car a mirror finish as well, I was sold! When my sister acquired a company car that was well used with a red finish that was badly oxydized, I gave her a bottle of Oxygone. It was immediately better, but with repeated usage she got that car to look showroom bright!