Bicycles, E-Bikes & Micromobility calculator

Frame Paint Scrap Calculator

Paint scrap affects frame cost, launch colors, dealer availability, and rework load. Paint and quality teams use this calculator to track rejected frames, forks, fenders, racks, scooter decks, and battery covers caused by adhesion, color, orange peel, dirt, masking, or handling defects.

What this calculator does

  • Calculate bicycle, e-bike, or scooter paint scrap from scrapped painted parts against inspected painted parts, with a target scrap rate.
  • a bicycle or micromobility paint line needs to measure paint scrap for a color, model, shift, supplier, or coating process
  • Returns painted-part scrap as a percentage of inspected painted output.

Formula used

  • Paint scrap rate = scrapped painted parts ÷ inspected painted parts × 100
  • Paint scrap gap to target = paint scrap rate - target maximum paint scrap

Inputs explained

  • Scrapped painted parts: Use frames, forks, racks, rims, fenders, scooter decks, covers, or panels rejected and not economically reworked.
  • Inspected painted parts: Use all painted parts inspected for the same color, shift, model, supplier lot, or coating process.
  • Target maximum paint scrap: Use the scrap limit for the color, coating, substrate, cosmetic grade, and production maturity.

How to use the result

  • Use it for paint booth reviews, color launches, supplier quality, rework staffing, and finished vehicle cost control.
  • It does not include reworked parts unless they are ultimately scrapped; track rework yield and cosmetic downgrades separately.

Common questions

  • Should reworked paint defects count as scrap? Only count them as scrap if they cannot be recovered. Track rework separately when parts are repaired and accepted.
  • Can different colors be combined? Use separate calculations for colors or finishes with different defect rates, appearance standards, or cure processes.
  • Should supplier-painted parts be included? Yes, if they are part of the inspected population and you want the supplier's paint performance in the rate.
  • How can I use the result? Use it to prioritize booth cleaning, masking fixes, handling changes, supplier containment, or coating parameter updates.

Last reviewed 2026-05-12.