Re: Glass polishing options
Well...there used to be a Diamondite polish that actually worked (with a rotary, anyway), but they don't sell that anymore.
There is the Carpro Ceriglass which theoretically is similar, but I've heard enough horror stories here to scare me off of it.
If you are going to use a DA, if it were me, starting over, I'd go with the "sandpaper" solution. If you google for some pro glass polishing supply places, you will find some that sell a range of special sandpapers from coarse to fine and then a polishing disc. The place I found had 3M papers, but I don't think that's really the primary application that 3M makes that for.
I don't think you'll ever see Autogeek selling anything like that because it would be too easy to frost your whole windshield over with the coarse paper, and take a long time to bring it back from that.
"Spray it like you mean it!"