Originally Posted by SmithsonGA

I thought I would add a few comments. I work in the plastic industry. These headlight lenses are made of a plastic called polycarbonate. You may have heard of Lexan as a tradename, for example. This plastic has poor UV (sunlight) resistance. It will yellow, haze and crack with extended UV exposure. Therefore, the lenses are coated with a silicone hardcoat. This hardcoat will not last forever either. I do find it odd that it seems very unpredictable...could be the quality and different suppliers the auto companies use. It certainly matters where in the country you live (e.g. Florida or Arizona will be much worse than Minnesota) and if you park outside a lot (do you park the car in a parking lot outside at work all day?, or in a garage?)

Anyway, my concern over these polishing kits is you are basically removing this hardcoat and exposing the polycarbonate, which is much less UV resistant than the original coating. You could try to polish and basically continue to do so on a very regular basis.

Someone commented earlier and I have to agree, the only long term method is to polish completely and find a paint shop that can clearcoat the headlight.

Originally Posted by SmithsonGA

I thought I would add a few comments. I work in the plastic industry. These headlight lenses are made of a plastic called polycarbonate. You may have heard of Lexan as a tradename, for example. This plastic has poor UV (sunlight) resistance. It will yellow, haze and crack with extended UV exposure. Therefore, the lenses are coated with a silicone hardcoat. This hardcoat will not last forever either. I do find it odd that it seems very unpredictable...could be the quality and different suppliers the auto companies use. It certainly matters where in the country you live (e.g. Florida or Arizona will be much worse than Minnesota) and if you park outside a lot (do you park the car in a parking lot outside at work all day?, or in a garage?)

Anyway, my concern over these polishing kits is you are basically removing this hardcoat and exposing the polycarbonate, which is much less UV resistant than the original coating. You could try to polish and basically continue to do so on a very regular basis.

Someone commented earlier and I have to agree, the only long term method is to polish completely and find a paint shop that can clearcoat the headlight.

Originally Posted by roskinc

exactly. on my write up i put that sanding takes away the uv protecting coat. and when i have my headlight out to do the orion install, while its out im going to shoot it with body clear.