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Heh, just has to be at least 00 or finer, or at least that's the "coursest" I'd go.
Granted, it's always best to try going about the least aggressive way possible. Glass cleaner -> vinegar -> Rubbing compound by cloth/microfiber/pad -> Bar Keep's Friend (don't get it on paint) -> steel wool
Or, if you have some laying around, glass polishing pads work pretty well. Also work well in getting rid of thin scratches.
-- I wasn't aware there was a risk here...
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don't tell me the swirls in the windows are scratches? lol...news paper and glass cleaner works great! been using it since i was a kid, thats what my mother made me use when cleaning the windows at her business!
I'm-- I wasn't aware there was a risk here...
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don't tell me the swirls in the windows are scratches? lol...
Naa, I've used it for like - ever.. on baked and caked spots...
There must be a product for these critters these days?.
Heh, yea, 0000
That's it... New glass again is good. 

Heh, yea, 0000 (not 00 like I said originally) is usually what I've read to use. Also makes great fuel to start a fire
I know steel doesn't technically scratch glass (why razor blades are fine to use when peeling stickers), but there's always a risk of scratching. It just seems better to at least try with "less aggressive" methods first.
As for the scratches, it used a Diamondite system with pads (I think it used two?). It got rid of all but the deepest scratches on my side mirror. You know, the vertical scratches you get from rolling up your windows repeatedly with trapped dirt. I don't see it anymore on Autogeek, only one to get rid of water spots and what not.
I've heard that umbilical fluid drained from a newborn baby boy born on a full moon works wonders on water spots...Anyone looking to be the first to try this out? I know of a half breed mexican crack addict downtown who would probably sell cheap!
