Gary I've used various kits including Harbor Freight, but the best one to polish them out so far for me was Mothers Power ball kit, which is reuseable, and to seal them after buffing I've used Bluemagic Headlight lens sealer. Both are pretty cheap and easy to use. Whatever you choose, the will refog much faster once you do this, unless you seal them with some sort of uv protection, which is why I now treat them with the Bluemagic stuff. So far so good.