I use 3M plastic cleaner and polish, as maintenance. There is a bunch of kits out there but have never tried any. The combo of the cleaner and polish I have do pretty well at bringing around dingy lights.
Stole the idea from other forums. I'll start:
Changed out my horns to horns from a 95 4runner "beep beep" not the American honk.... Also had an alignment done yesterday, wow I was suprised how off things get while wheeling. Next:whistling2: