My windshield on my boat was really showing it's age and I wanted to try something that had been in the back of my mind for a while. I bought the "headlight restoration kit" by 3M from Advance Auto Parts. It cost about 18.00. I first removed my windshield and gave it a good cleaning before I started. I followed the instructions and you wouldn't believe how good it looks! I wished that I had taken before and after pictures. Everything is included in the kit.