I should have bought the four pack.  I wanted it for my shower doors and my car. Someone had touched my car with their red one and I had a quarter size spot on my white car in red. I had washed it with everything to try and get it off. It was not a dent bout then I had a strange line too on the front corner of my car. This polish took them right off with a little elbow grease and I was amazed.  My shower door had twenty years of soap scum on it and I spent two days and a razor window scraper to get it off. So now I have applied the polish to keep it looking new again.  Can't wait to see what else it can do.