When I ordered this product, I was hoping that it would work as well as it is advertised. I have a 2 week old watch that got 2 scratches in the crystal. I also have an older watch with some kind of chemical (?) spots on the face. I used polywatch and BOTH watches look like brand new. The scratched watch were a little deep and one had some red coloring in the scratch. All of this was removed. I have not had any real deep scratches yet and hope that if I do get one of those, the Polywatch will work just as well.