Acetone is a solvent, which means it can break down or dissolve substances such as paint and varnish. That's why it's an ingredient in nail polish removers, varnish removers, and paint removers.
If the area retains its color and texture, it's likely safe to apply acetone to the stain. Acetone can also be used as a household cleaner as well, though you'll need to take precautions. Wear gloves, ...