I used this product a few times on one of my headlights that was starting to oxidize and it covered up the problem, but within a few washes and a few more applications, it actually made the oxidation worse. Maybe I used it incorrectly, I'm not really sure, but I haven't used it since. That headlight was eventually restored by a professional and then replaced as it got damaged in an accident. I do like Meguiars products, just not this one. My other headlight is starting to look a little shabby and I decided to use Ultimate Compound by Meguiars and it has done a much better job. I also used it on my girlfriend's and dad's headlights and the Ultimate Compound really cleared away the oxidation. I then followed that with some carnauba wax, very nice.