I have used the permatex kit and it works great. All it is sand paper, you start out with 1000 wet dry sand papper. Soak the sand paper in water then start sanding in one direction, then go to the 1500 grit and sand in the other direction, on to the 2000 grit sand in the other direction, then on to the 2500 grit and sand in the other direction. make sure the sand paper is always wet. When you finish sanding take rubbing compound over your lights to finish, then put a good coat of wax on your lights. My lights looked like new ones. You can save your self money by going to a auto paint supply place and just by the sand paper for about 1/3 the cost of the kit, one sheet each will do several vehicle 1000,1500,2000,2500 wet/dry sand paper.