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Resin Parts Calculator — Aftermarket Prep Planning
Plan resin aftermarket part preparation including washing, pinning and glue quantities.
How We Calculate This
Estimates the preparation time, CA glue and pinning materials needed for a batch of resin aftermarket parts, so you can plan a bench session and order materials before you start.
Formula
- Wash time = your Wash Time input (default 15 min — a typical warm soapy-water soak)
- Prep time = Parts × Time per part (≈3 / 6 / 10 / 15 min for small / medium / large / XL parts — flash removal, cleanup, test-fit)
- CA glue = Parts × Glue per part (≈0.02 / 0.05 / 0.1 / 0.2 ml by size — roughly one medium drop per medium joint)
- Pins needed = round(Parts × Pinning factor) (0.3 / 0.6 / 1.0 for some / most / all)
- Brass rod = Pins × Pin Length (default 8 mm per pin — split ≈4 mm into each mating part)
- Total time = Wash + Prep + (Pins × Pin Set Time) (default 5 min per pin to drill and set)
The per-part time and glue figures are rule-of-thumb planning estimates from typical bench experience, not measured constants — your own pace, part complexity and the CA viscosity you use will vary. Treat the totals as a guide for budgeting time and materials, then adjust the Advanced Options to match how you actually work.
Frequently Asked Questions
Resin parts are cast in silicone moulds coated with release agent. This oily residue prevents paint and glue from adhering properly. Soak parts in warm water with washing-up liquid for 15-30 minutes, then scrub gently with an old toothbrush.
Pinning means drilling holes in mating surfaces and inserting short lengths of brass or steel rod to create a mechanical joint. Resin is heavier than plastic and CA glue alone may not hold. Pinning adds structural strength to the bond.
For 1:48 and larger parts, use 0.8-1.0mm brass rod. For 1:72 and smaller, use 0.5-0.7mm. The rod should be about 4mm deep in each part. Use a pin vise with a matching drill bit to make the holes.
No. Poly cement only works on styrene plastic — it dissolves the surface to create a weld. Resin is a different material and poly cement will not bond it. Always use CA (superglue) for resin. Medium viscosity CA is best for most resin joints.
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Last updated: February 2026
All calculations are estimates. Always verify quantities before purchasing materials.