tattoo - 42 Halloween Costume Ideas
A tattoo detail can pin down a character fast, Scorpion's marks, Skade's Viking-style ink, Steve Randle's simple look. It's a small addition that reads well in photos without needing a full costume change.
Temporary tattoo paper or a good marker-based design both work, just seal it with setting spray so it doesn't smear on clothing or skin during the night.
Not if you seal them with setting spray after applying. Skip that step and they will, especially if you're sweating or it's warm.
Long enough for one night easily, most last a day or two even without special sealing.
Yes, a fine-tip marker works fine for simpler designs, just practice on paper first if it's detailed.