I've used the Maguires headlight restore stuff in a bottle and had good results. I do have to do 2x/yr, but for 20 minutes every 6 months, not bad. I do put a coat of wax on the headlight lenses when I'm done. SR, do you have to put a new coat or 2 on the lenses since you used the sandpaper. Read on some car forums the clearcoat is needed to seal the plastic up again since that is what you remove?
GO BIG ORANGE !
I meant to behave, but there were just way too many other options available at the time.