I discovered a 2-foot long black mark on my front fender (caused by a stray shopping cart, no doubt) and I tried to remove it using soap and water and a sponge which didn’t work. I then used a Scott’s green scrubbie which did get the black mark out, but left some light scratches on the finish. These scratches weren’t very deep, and only penetrated into the upper layer of the clear coat of the paint. However, they were really noticeable from a short distance as you walked up to my car (ugh!). So, after some research I decided to try the Quixx Paint Scratch Remover since I only need to repair the clear topcoat on my car.The Quixx kit is basically a method to sand out the scratches in the paint surface. You start out with 3000 grit sand paper (which will sand out deep scratches but leaves smaller ones), then use the #1 paste, then onto the #2 paste. So, you successively use less abrasive products to get the final scratch-free surface.In my case, I only needed to use the #1 and #2 paste since I was working with faint scratches in the clear topcoat paint. These are really mild abrasives, so even with the #1 paste I didn’t see any major swirl marks or faint scratches after using it. You really need to push HARD to get the scratches off the topcoat since it can be a really hard finish. I rubbed the #1 paste for 2 minutes on the scratches and after two applications they did come out! It actually looked good and glossy with just using the #1 paste, but after I used the #2 paste since that was specified in the instructions. The final look was exactly what I wanted– you can get up real close and you can’t see the scratches at all. The glossiness of the finish matched the rest of the car too.Now, this is my experience using this product on some relatively mild scratches on the clear coat finish of a 1-year old car, so your situation may be different if you have an older car, deeper scratches, oxidation, etc. But, in all this product did exactly as advertised for a very small price!