Terry Moore replies: Acetone is not a stain, it is a solvent. Unfortunately, it has not stained the cabinet in question, it has melted the finish. The acetone is a strong fast drying solvent that will attack any finish such as lacquer, urethane, oil or varnish. If you know what the finish is, you may be able to spot sand it and re-apply some new finish. Good luck!
Marty Milkovits replies: You don’t. If the blemish is not too deep, you can try rubbing it out with emery paper progressing to smaller and smaller grits.