well... i washed them, used some scotchbrite.. nothing heavy just enough to scuff it up.. cleaned them again.. sprayed it, let it sit for 15-20 mins (enough to dry to touch) sprayed again.. (kindve heavy coats) let them sit for several hours.. You could see the scuff marks from the scotchbrite, so i went and got some wetsanding paper 1500g and 2000g wet sanded it pretty lightly to get rid of the scuff marks.. Washed them off.. and they became very very foggy.. so then i used some rubbing compound and that got rid of alot of it, and then used like 3 coats of turtle wax let each coat sit for half hour.. turned out OK... still not very shiny and can see some scuff marks.. I just picked up a mother power ball and some mequiars plastic polish and cleaner going to hopefully get them *****es to SHINE...
If i were to do it again (and the way i SHOULD have done it in the first place) is to just wash the lenses real good, and just paint them... if i wouldnt have scuffed them up they would have looked really good right after i painted them.. A couple friends of mine just cleaned them up and sprayed them, nothing else, and their's are holding up just fine.. he said his cab lights are starting to fade a little bit (but he did them probably close to 2 years ago and he doesnt have clear coat on them)
So we will see tonight if this plastic polish is going to do the trick... I was just like you, very learly about doing it, but i just went ahead and just did it and i would have been alot more impressed if i would have just sprayed them and put some clear on them....