<p>Funny you should ask. H just used one of these polishing kits (Turtle Wax brand, I think he said) on his eight-year-old car. After he did one, the difference between the two headlights was remarkable. It did, however, take him about an hour and a half to do both of them, working carefully. We do live in an area where there is lots of sand put down during snowy weather and a lot of wind, so I would guess that his headlights took more of a beating than they might if we lived in San Diego.</p>