Complete newbie here! Planning to make a custom fit Green Hornet Mask from the 1966 Van Williams hornet. I know I need to do a mold of my face, then a positive to sculpt the mask on...then a mold of that. It's at this point that I get lost in the process. Thinking the mask should be out of some kind of urethane? I'd love any and all comments, suggestions...help! Thanks!