I saw charcoal powder used for makeup this weekend and it blew. my. mind. Flawless application in seconds. The gentleman using it then let it set for a second and used a paintbrush and silver face paint to add runes. Went on right over it, no problem. I’m seeing if I can get his permission to post photos- in the mean time, enjoy this tutorial by Kat for The Coral Gate!
Ben Nye Charcoal Powder goes for $4-$15, depending on size. Mallatt has it at $9 for a 4.5 oz container, but it can be found at pretty much any costume store.