What glue can be used to temporarily glue costume accessories to the skin?

You want to use what's called rubber cement. I know that the name sounds ridiculous but go to any costume store [or art supply store] and ask for it. It comes off real easy and leaves no residue. If you have ever been to Kings Dominion during Halloween, they have these Ninja stars that they put on you and paint it so it looks real. They use rubber cement to attach those.