pure based acetone, xylol and some light buffing, but these chemicals are very toxic and harmful to the touch, i had accidentaly ran over a gold can of spray paint at my old job... covered rim, tire, entire under carriage, left front fender and all way down orange peel bottom...it was not easy to get off at first, but it will- just be careful with those solvents- i actually wouldnt reccomend them to anyone because some people just dont know how to handle them correctly and end up buffing off the clear coat, then the paint, but it does work, just be careful!! as for the windows, BazookaJOE is right on target,steel wool is best.
And there is not a spot of gold anywhere or miss-colorness of paint!