I think if they're etched into the glass, you're sol.
If it's dried sediment you might try using car wash & lots of rubbing.
Maybe several times as the cleaning solvent in car wax is not very strong.
I'd shy away from ANY polishes, abrasives (even light ones) as they will leave scratches the you may only see with oncoming headlights.
Afterwards, you can clean off the wax w/window cleaner that contains ammonia.
good luck greg409
Last edited by greg409 : 10-10-2008 at 10:48 AM.
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