I did this today and the results are amazing! The headlights look almost brand new. I had some pretty noticeable scratches on the driver's side headlight and they are all gone now. I wet sanded twice with 1000 grit followed by 2000 grit sandpaper I picked up at Autozone. After that it took about 4 applications of the Meguires PlasticX polish to get them clear again. Upon close inspection there are a few areas of fine scatches that could probably use another go around, but overall things look a lot better then they did this morning. I spent about 40 minutes on each headlight.