The next step is to create a plaster shell over top of the clay blanket. I like to add fiberglass to the plaster for added strength. Once the plaster is set I lift the shell off and remove the clay. Now I have a 3/8" gap between the plaster and the face. I also have a pouring spout and some vents where the straws were. Next I drill the shell back into place and get ready to pour the silicon rubber.
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