Bests & Worsts Reviews from Amazon

Originally i had given this four stars - but upon further time to assess the effectiveness, i have to reduce it to two. The product does appear to work because you do reduce some fine scratches, and the windshield becomes clearer as result of it removing not the scratches, in as much as other contaminants on the glass. But when you look at headlights and drive at NIGHT time, you can see that the scratches and swirls for the most part remain, although reduced. This results in distorted oncoming headlights and you get a fuzzy, hazy spread of light sources coming through your windshield. At first i thought this is as good as i can get my 14 yr old windshield, but its distracting and potentially dangerous, and turns out that you CAN do better with something else. And i don't know everyone else, but this is what's important to me and why i'm trying to fix it - night time driving and oncoming lights. While using the felt pad and the cerium oxide solution is the right idea, the mixture of the cerium oxide and the quality and size of the felt pad in this package is incorrect and insufficient to do a good job. The cerium oxide is too fine/weak and the felt pad quality and size is too poor and small to cut enough in to the glass to smooth it out. Yes, if you do it enough eventually it may get there for small areas and scratches perhaps, but I've done my entire windshield twice on two cars, with each session being 1-2 hours, and the distortion and scratches remain. Since this is my first time, i had thought that perhaps i'm not using the drill correctly (not enough or too much rpm or pressure on glass and the kind of motion needed) or not enough of the mixture and water spraying, and it was my technique that was at fault and not the tools at hand. The CORRECT method, if you want to do the entire visible view of the windshield right and not a small scratch, is to get powder cerium oxide and mix that with water, use plenty of it, and use a quality felt pad that is five inches in size, not three. And this is what i did and the results can't be even compared. I spent a lot of time doing this for both of my cars, and if you need to do the entire windshield, do yourself a favor and get the powder and mix it yourself, and use a larger pad, and if possible, a rotary polisher or sander (as for a drill, the larger pad size may make it difficult to keep consistent contact with the glass). You will get lot better polishing and correction, for a lot less time and effort. There is a 8 oz cerium oxide (which will cut more than this solution) that sells on amazon and you can find the 5 inch backing pad and felt pad all for about the same price as this in total. A bit more money spent in trial and error on my end, but I hope this review saves you some time, effort and money.