Fingernail Polish
Nail polish is another tricky stian to remove. Be sure to follow the general Stain Removal Guide. Use a non-acetone fingernail polish remover. Dab on wait 30 minutes and rinse with vinegar and water. If this does not remove the polish, try some brake cleaner or cigarette lighter fluid. Yes these are highly toxic so open the window and get a fan running. Be sure to wear a face mask.
After the stain has been removed, dab on some liquid dish soap wait 10 minutes and rinse. Always test a small area first as both brake cleaner and lighter fluid can leave stains that cannot be removed.