Not sure why the photos are sideways, They are vertical in my computer.
Hey Nebulosity, good question.If I'm following the post correctly, the silicon is used to create a mold for casting the greatstuff, right? Could the mask itself be used as the mold if it has sufficient detail on the inside? In the meantime this looks like an inexpensive (if smelly) way to make a mold for a lot of stuff.