You can use any nail polish remover. But if you're out, there are a couple of other ways. Hand sanitizer works on removing most polish amazingly. Also, you can paint another {thin!} layer of nail...
I tried this trick, it's easy. I know it sounds odd---but try it. Coat the area of your nails that has nail polish onn with another type of nail polish. Leave the polish on for about 10 seconds, then...