I tend to use Autoglym stuff for car cleaning, and noticed that they do both a glass cleaner, (spray stuff), and also a glass polish for getting windows super shiny.
Seeing as I was too tight to shell out for the glass polish, and noticing I already had the Autoglym Super Resin Polish for polishing the bodywork, I gave that a go. If it polishes paint it must be alright to polish the glass too I figured.
And it worked! :thumbsup:
On my 200SX where the outside of the windows, (especially the rear screen), felt not very smooth, and had these watermarks and other marks that wouldn't wash off, it cut straight through. Afterwards the glass was mega smooth and shiny, and ultra clean.
Had a go at the insides of the windows and it worked there as well, you could see the polish cutting through the grease. I used the same techniques as for polishing paintwork. One cloth for polishing, one for buffing.
I wouldn't recommend it on the insides of windows tinted with film obviously, but it worked great for me on normal glass. Worth a go if you've got some car polish lying about, but I guess you wouldn't want to use one with wax built into it, just a pure polish.