I found a product called ClearJet that is both a UV and abrasive protectant. It comes in a 12 oz. spray can and costs about $12. The product description says it is made to protect vehicle graphics (among other things) such as decals and stickers. Safe for almost all surfaces. Anyway, I bought a can and applied it to my fairly new headlamps. It's easy to use, though it likes to run so we propped up the headlight in a horizontal position for a few minutes. I couldn't have imagined such excellent results. It actually made the lamp look BETTER than new. It now looks like it is made of crystal. We'll see how it holds up. This may be the headlamp "Holy Grail" we've all been looking for.