[Phantasm]

Basically, I have a character whose day job is a makeup artist for a studio that does a lot of sci-fi series (along the lines of Star Wars, Star Trek, and Babylon 5) as well as some "game face" vampire series (Buffy/Angel-verse style). In addition to the usual Disguise and Makeup skills for applying the rubber prostheses to the performers, he is also engaged in making them.

Any idea which skills would be used to make things like a Twi'lek's head-tails, a Klingon's brow ridges, or a Minbari's head-bone (to name a small sampling) for application to the human head?