I bought my Toyota Tacoma brand new in February 2007, but it was an '06 leftover, so it had sat a while on the dealer lot and the windows were plagued with water spots (the paint was too, but a little FPII via Makita cleared that up, though). I tried everything- conventional glass cleaners, vinegar, Autoglym Glass Polish (by hand and PC), Zaino glass polish (by hand), clay. Nothing worked. I finally started to look into machine applied glass polishing kits. I looked at a few different kits and settled on this one by Diamondite
Diamondite® Glasswork System Kit for Machine Application - Automotive Glass Care
The directions are pretty straight forward. After getting the glass clean and then claying it using the included clay bar I began to work on the polishing. I put the included backing plate and pad on my Makita 9227 and applied the Glasswork Restorer in an "X" on the pad as directed. I then dabbed the window I was applying it to as I would when applying a polish to paint via PC. I spread the product on a slow setting, then bumped it up between speeds 3 and 4 (approx 1700 RPM). I polished the glass exactly like I would the paint, slow and steady, using overlapping back and forth motions, and then up and down. Typically, the polish had already broken down after two complete passes, if I applied a little much I needed one more pass for it to fully break down. If I were working on a side window, I was able to polish the entire piece of glass with one application, while the windshield or large back windows would need to be divided into sections. The results were, IMO, impressive. There are no portions of warped glass that I can see, nor are there any holograms or anything like that. This kit is really easy to use for anyone with experience in handling a rotary (I have no idea how well this kit will work on a PC).
Diamondite® Glasswork System Kit for Machine Application - Automotive Glass Care
The directions are pretty straight forward. After getting the glass clean and then claying it using the included clay bar I began to work on the polishing. I put the included backing plate and pad on my Makita 9227 and applied the Glasswork Restorer in an "X" on the pad as directed. I then dabbed the window I was applying it to as I would when applying a polish to paint via PC. I spread the product on a slow setting, then bumped it up between speeds 3 and 4 (approx 1700 RPM). I polished the glass exactly like I would the paint, slow and steady, using overlapping back and forth motions, and then up and down. Typically, the polish had already broken down after two complete passes, if I applied a little much I needed one more pass for it to fully break down. If I were working on a side window, I was able to polish the entire piece of glass with one application, while the windshield or large back windows would need to be divided into sections. The results were, IMO, impressive. There are no portions of warped glass that I can see, nor are there any holograms or anything like that. This kit is really easy to use for anyone with experience in handling a rotary (I have no idea how well this kit will work on a PC).

