Removing paint from windshield

so - the continuing saga - after my glareshield fell off on takeoff (see
earlier post) a friend repaired it and remounted it. Then he noticed
that he had "missed" a few spots so he brought the aerosol of black
paint into the cockpit . . . well, you can guess the rest.
Does anyone know how to remove black paint spots from the windshield?
600 grade wet and dry paper was suggested by our local aircraft parts
supply house - sounds a bit extreme to me. I also tried lexan scratch
remover - GREAT product - available from any good Harley Dealer - great
on scratches that is - not too hot on paint.

Any ideas gratefully received

Tony

--

Tony Roberts
PP-ASEL
VFR OTT
Night
Almost Instrument
Cessna 172H C-GICE