headlight damage in 3D
 

This image came from a site where Headlight cleaning is a science

https://cimg9.ibsrv.net/gimg/www.clu...70338371aa.jpg

It shows that oxidation and UV damage are two different problems.
It also illustrates the position of the damage showing why you can't fix UV damage.

Pretty helpful to look at headlight cleaning from a different angle.