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, ...
It did a fine job cleaning all but the crustiest rosin flux ... Alas, almost all of the cheap and readily available aerosols have acetone as the principle ingredient, mixed in with methanol ...
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.
“Again, always be sure to rinse the areas you apply acetone.” Removing nail polish from tile “For dried nail polish on ceramic or porcelain tile flooring, I would recommend using a Mr. Clean ...