Quote (chappy0691 @ Dec 27 2014 07:58pm)
Yes I did when I did it on my car.
But unfortunately I don't think that helps him in this case unless you think it'll work on a windshield lol (I know it sounds dumb but I don't know how exactly the scratch x works to remove scratch, residue etc., I just know it does a Damn good job at it)
You can compound a windshield just like paint. It takes waaay longer though.
If the stain on the windshield is repelling water i would clean the windshield with a good foaming glass cleaner then rain x it.