
The kit worked very well on a windscreen that was badly scratched by the wipers. The tracks were almost completely removed and the car became much more tolerable for night driving and night driving in the rain. I used the powder first as a test, then ended up using the second smallest disc, then the thinnest disc and then the cerium oxide mix for the fastest results. I used soapy water to lubricate the grinding wheels. I just used a cordless drill for the driver's side and a dual-action polisher with a 3" pad only for the cerium oxide stage on the passenger's side. Definitely worth the money and time spent preventing the windshield from being replaced. I easily spent 2-3 hours on the project. Cerium oxide will go everywhere when it detaches from the pad, so prepare for a thorough cleaning or use other methods to minimize the affected area.

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