Are you sure you used 99% technical grade acetone? It shouldn't cause any damage. If you used something like nail polish remover then, yes, it could've been detrimental to your coin. There is pretty much nothing else you can do that wouldn't make your coin get a details grade.
Also, there is a rumor that coins that contain copper will react to acetone in presence of light and water, however I don't know if it's true. If it is, maybe that's what caused the reaction.