[Christ]

If the windshield is just getting that bad, consider replacing it. Once pitted, polishing glass won't do much for the pits, especially if they're more than .001" deep, since when you polish (non-porous, remember) glass, you're only taking off a few thousandths anyway.

Safe-Lite glass, by the way, is heat tempered and lighter than molded plate glass. It also contains a plastic layer in the middle, which, in addition to tempering, prevents small rocks and other impacts from completely shattering the windshield, instead, just leaving a possibly repairable star chip or a terminable crack which won't interfere with the driver's field of vision.