Sandblasting . . . works a treat! Or that homemade stuff that Ultrapaul necks out of a brown bag . . . stronger than Acetone! Sorry Kev, bored and clueless!
The only safe thing to do is bring them to my house and leave them. It's the only way to be sure. PS Soap and water bro.
Heh...definitely me! Anyway, I find those alcohol pads are really good...the obviously don't react with the plastic or paints...just watch out for the stickers...don't want them to peel.
Lemon Pledge wipes finished them off really nicely after a good cleaning. Now they look and smell good!