Finally got my second set done. This is my daughter's car. They were in embarrassingly horrible shape so I couldn't wait to get them cleaned up for her. I learned several good things on these: 1. I started with 800 grit and it wasn't cutting it. I didn't have 600, but I did have 400 so I went there and it worked. 2. I also learned that 400 leaves some good scratches that I thought I had eliminated, but after finishing with 4000, I could still see them. 3.I learned that going back and resending them through all the grits isn't that big a deal and the results were much better. 4.I learned that these little discs don't really last more than 1 set of lights. I tried using my first set of discs and I think that hurt me. By that, I mean the 'used' discs weren't able to really erase the scratches of the 400 grit, but when I used a new 800 it worked better to remove the 400 grit scratches. In other words, saving discs isn't worth it! I'm just gonna toss them after one set of lights. Let me know if my conclusions are off. But, I'm pretty happy with how they turned out. PS - try to ignore the horrible, and pealing, paint protective film on the bumper. It's how the car came...