Yes, you are mostly correct about that. They actually used 1 1/2" "plastic" phone nail brads #10 size for the prostestics. They couldn't use real nails because of SAG and OSHA rules. The plastic flat head nails looked really poor because of the flat head and the the decision was made to use rounded head nail brads modeled after hat pins. My understanding is that PinHead came about from an off-handed remark that Clive Barker made during the shooting of Hellraiser referencing a certain person on the set whom he had a confrontation with over "artistic licenses" being taken with his novel. Sorry, TMI and I digress, I'll definitely post the results and the methods used. Thanks for the interest!