Well, if you're interested in plaster skulls, I humbly put forward my tutorial here:
http://halloweenforum.com/tutorials-...ing-101-a.html
The adult size skulls start on page 2 there.
The supplies are all available at Michaels now as well, and pretty darn cheap with a coupon or two.
I used 3 molds last year to make 120ish skulls. They end up running well under $1 each.
