I wish I had taken a before and after picture of my windshield but, it had a bad, 3/8" wide scratch on the drivers side left by the wiper blade that extended the entire sweep of the wiper. Being the original Car-Lite windshield with no chips or cracks, I really wanted to try to preserve it. I decided to buy a small bag of Cerium Oxide glass polishing powder from Amazon. I already had a 1" round, hard felt buffing ball that came with a die grinding set. You mix the Cerium Oxide with water until you have a runny paste. I began buffing using my 20V Dewalt drill motor and after about an hour, the scratch was completely gone. I was quite amazed. The wide scratch was white and a real distraction while driving not to mention and eye sorer. Anyway, the stuff works and works very well. Just thought I would share.