Before we discuss how to cast better, we must understand why Woodman Rebecca materials respond differently than generic urethanes.
Woodman Rebecca casting resins are formulated with a tight molecular weight distribution. Unlike budget resins that contain large oligomer chains leading to bubbles and shrinkage, the Woodman Rebecca line uses engineered monomers that cure with minimal exothermic reaction. This translates to three immediate benefits: woodman rebecca casting better
To start casting better, first verify you are using authentic Woodman Rebecca product. Counterfeit or expired resin will never achieve the results outlined below. Before we discuss how to cast better, we
For large parts exceeding 5 lbs, do not mix all at once. Mix 500g batches consecutively, pouring each while the previous is still liquid (within the pot life). This prevents overheating and shrinkage. To start casting better , first verify you
Demold at 90% cure (usually 4–6 hours for standard Woodman Rebecca). Immediately sand with 400-grit wet paper, then 800, then 1500. Finally, flame-polish with a butane torch – pass quickly at 6 inches. The urethane will gloss without melting.