Any alkali deposits or any such thing (on glass), use a razor scraper.
 DO NOT use a 3M green scratch pad.  Glass is harder than steel, but
not as hard as the scratchy element of scratch pads.  Oh, yeah.  Use
good clean blades with no rust on them.  Rust is harder than glass and
will scratch the windshield.

Karl Wolz

On Mon, Mar 30, 2009 at 7:21 PM, AD Felder <dieseldoofus@yahoo.com> wrote:
> A neat trick I tried this weekend that worked.� If you have rust stains on your window glass, like from your vent pivots, use a really good grade of oil, like gun oil or bicycle oil, and some fine steel wool.� use no pressure at all, just go over it in every direction.� clean off and the rust is gone.� looks like new glass.
>
>
>
>