I bought a kit from the Ford dealer to clean up my cloudy-yellowed-hazy headlight lenses (1998 Mustang). They told me it would help to a degree, depending on how bad it was. So I started the project with fairly low expectations.
The package advertises easy as 1-2-3 in less than 5 Minutes!!
Well, it took more like 90 minutes but I am very happy with the results. Check out the pics:
The kit cost about $26.
I took the car out for a spin tonight to see how much more light was there. It's hard to quantify, but the lights are much improved.
NO I don't work for this company! Just sharing my results.
Check out their website