I applied it to a black car (which is by far the most difficult color), 13 years old, whose paint was full of "spider webs" and in a couple of spots it had started to fade. You definitely need a polisher, don't think you can do the job by hand, no way! It removed the holograms ("spider webs") and light scratches (e.g. from branches on the edge of the road) by about 60%. Although the improvement is clear, I expected better results, that's why I'm not giving it 5 stars. I don't know if it was because I am an amateur doing it for the first time, if it's because the color is black, or simply if these are the capabilities of the polish. One thing is for sure though, if you are an amateur, it requires A LOT of patience and information from videos as it is a difficult process with many stages...