all i know is i tried to use sand paper once on mine and i did not have the patience to sit there more then 5 minutes. greg comes to you to do your headlights and its amazing how different they look. it was much cheaper then buying one new headlight for my car which is $330 or something for each one


here is a pic of my headlights before i had them done. if you compare it to the picture of my car in my sig you can see the HUGE difference. they look brand new