Cadillac SRX First Generation Forum - 2004 - 2009 Discussion, Headlight cleaning in Cadillac SRX Forums; Just got a used SRX and the headlights have a little yellow tint to them. Any ideas how to clean ...
Sand them down with fine grit sandpaper, starting at 400 and going progrssively finer. Once that's done, there's some special brew that members on here wipe over the lenses to make them last long. Works great.
I use 600 grit then 1500. After that some PlasticX polish and a mothers power ball. Follow up with lens sealer (to slow down the process of yellowing again), also sold at auto parts stores.
Or you can also use the wipe on products I guess, just never bothered.
Headlight lenses yellow and oxidize because the clear coat (UV protectant) wears away. Once you sand the lenses and polish, you will need to do it again every few months or so to keep them looking like new.