If you have patience and time, you will get the best results from this. It took me 2 hrs per headlight. Everything you need is provided in this kit, all you need is a hand drill (corded or cordless with extra fully charged battery packs), masking tape, a spray bottle with water, and lots of paper towels.
https://www.amazon.com/3M-39008-Headlight-Restoration-System/dp/B001AIZ5HY