Dull dingy headlights can make it difficult to see at night and detract from your car's apperance.
I have done extensive research and testing to find the best, longest lasting results. There are many different techniques to restore them but the coating determines how long the results will last.
We don't use any gimmicks or tricks, we start with sandpaper as low as 320 grit to remove the oxidized layer, then machine sand using progressivly finer and finer sandpaper up to 4000 grit to remove scratches. We then machine polish in multiple stages, finer and finer. Then we cover them with Xpel Ultimate protective film so that chemicals and oxygen can't get to the polycarbonate and re-oxidize. I don't know of any technique that gives longer lasting results and we warranty it for 5 years.
Typical price range is from $100.00 per pair for small, flat headlights with minimal oxidation up to $200.00 per pair for large, bulbous headlights with heavy oxidation, most are 140.00 to 160.00