correction, accetone WILL eat plastics i.e. monokote, econokote, ect. some plastics usualy harder ones are affected less. try dipping a styrefoam cup in pure accetone and watch the fireworks. but if you dont let it sit there for ages it wont hurt your coverin. however ive had it eat paint and it messes up uncured epoxy and will clean up dried epoxy, meaning that if you wipe it over a fiberglassed win long enough it will dislove all the epoxy. all this takes a long time though with pure acceton.