Acetone: What does it work best on?

[VAB2013]

I hope you're not using nail polish Viv. Not the same thing. That is bad for coins!

Thank you enamel, now that you mention it, the bottle says 100% pure acetone, but the ingredients says: Acetone, Denatonium Benzoate. Wonder what that second thing is. Seems like false labeling to me.

Edit: Well I researched Denatonium Benzoate and it is a bitter additive to deter ingestion. My research also took me to another coin website and the discussion there was that it becomes a solid when dry and will leave a residue on a coin so it's best to rinse the coin with distilled water afterwards but it should not cause any diverse effects. Then I found another article that said all acetone contains Denatonium Benzoate. Do you guys who have acetone from a hardware store see Denatonium Benzoate on the ingredients?