How To Handle Large Undercuts In The Brush‑On Mold Making Process
Step 6: Preparing Model For Plasti‑Paste
Use a rolling pin to conveniently roll clay into strips that will be used as parting shims. The purpose of the parting shim is to separate the support shell sections from each other. Use soft clay or water clay to create the parting shims. Smooth the shim and make an even 'wall'.
Warning, Plasti-Paste sticks to everything - especially urethane rubber, so apply Sonite® Wax to release Plasti-Paste from the mold. Then, apply Universal® Mold Release to the shim and the mold.
