It works really well at touching up shiny surfaces of SS watches. Just be careful around the brushed areas, if any, on a watch case, bracelet, etc. It will also take off any outside anti-reflective coating on a crystal. You can tape off brushed areas, etc., if you're worried. Otherwise a great product.
..if that Cape Cod cloth actually removes that light scratch. From what I understand, Cape Cod cloths are tarnish removers and metal cleaners and are designed to be as non-abrasive as possible.