I cleaned my plastic front Blinker/Parking lights today according to that post on Tuners. I think the NON popup lights in that article have a glass lens?? Correct me if Im wrong. Thats why they yellow more than the plastics but plastics do get alot of haze from rocks and sand.
Heres a before Picture.
And heres an after Picture.
There is a big difference. It didnt take long at all with a buffer and some compound. The sandpapaer was 7 bucks because i didnt have any that grit.