Eric Strebel demonstrates how to replicate the hard-to-find clear dust covers for IBM Selectric typewriters using resin casting. The process involves creating a two-part silicone mold (tin-cure, de-gassed) supported by 3D-printed PLA and foam board, then casting clear epoxy resin with a colorant to match the original smoky plastic. Curing is done under heat and pressure at 60 PSI. The technique produces near-indistinguishable replicas and is efficient for making multiple copies since the mold is reusable. The method is broadly applicable to reproducing any clear or translucent plastic parts.
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