Originally Posted by 93GRandZJ
You need a few things to do this.
1) clean spray bottle with water and just a few drops of liquid dish washing soap
2) 600, 800, 1000, 1200, 2000 grit wet/dry sandpaper
3) 3M buffing compound and/or you favorite plastic polish (I used both the 3M and Meguiars plastic cleaner then plastic polish).
4) Painters tape (if you are doing them on the vehicle)
5) Some good car wax
6) Several micro-fiber cloths (or old soft towels)
7) An electric or air buffer/polisher (optional)
Start by wetting the light with the water/soap mixture. Then start sanding in a back and forth motion with the 600 - keeping the light wet with the spray bottle - and work all the way up to the 2000.
When you get done with this (should take about 30 minutes) your light will look very hazy/cloudy as you have yours now.
If you have a buffer (will make it go much faster) put on a wool bonnet (or what ever it came with) and a quarter size amount of the 3M buffing. Work this back and forth over the light for a few minutes - making sure that you don't let the bonnet run "dry".
Wipe off the excess compound with on of your clothes, then change bonnets and move on to the plastic polish. Same as above - wipe between applications. Buff it out by hand with a clean cloth and you are done. You should have new headlights again.
Last step would be to use a good wax to wax the entire lens. Again, I used Meguiars Gold Class.
Those are the steps I used cept for the that in BOLD. My thinking is this, without using the Clear Coat paint, and just using a polish it WILL dull up again unless you constantly apply the polish.
I wash my Jeep and dry my lights and they look so frigging new it aint funny. Ill apply wax or more likely Lucas Slick Mist on the light when I do the whole truck.