I have helped a mate in a panel shop quite a few times after resprays and all they usually do is clean it all with a razor blade, then give it a quick buff when doing the rest of the car.. :)
I find it also helps to use a slight cutting motion ( if going side to side then also go slightly up and down at same time to cut through overspray )and keep glass wet with a bit of soapy water to help the blade glide...
AUTOSOL is great for polishing windows
I've had plenty of practise as im a detailer and alot of the cars i do get cigarette smoke goo and the best way to really get rid of them is AUTOSOL.
Also potatos are good as they put a protective film over the window
Cut it in half, rinse it and apply to window slowly in a side to side motion. Works Wonders
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