Chipping off nailpolish with a pocket knife. 'Cause, you know, that's oh-so-safe. If my friends wouldn't have amused themselves with my fingernails in the first place, this wouldn't be an issue.
I recently learned that nail polish remover can go bad. . . . after, like 10+ years of being in a dark unopened cupboard. It turned a green colour. >.<'
That's odd. I couldn't find nailpolish remover, so I went to this method. It's working rather well, but I'm afraid I'll accidentally take my whole nail off....