Integrated Polishing System Symptoms
- Brown spots appear after cleaning, plating or storage.
- The surface looked acceptable immediately after polishing but changed later.
Troubleshooting
Brown spots after polishing or plating
Brown spots or local discoloration appear after polishing, cleaning, plating or later production steps.
Likely causes
- Contamination remained before a later process.
- The item was not inspected after cleaning.
- Surface contamination, porosity or contamination from previous processing remained in pores or recesses.
Checks
- Check whether discoloration follows recesses, pores or compound-retention zones.
- Review cleaning time, temperature and chemistry.
- Confirm whether the item was coated, plated or chemically treated after polishing.
Recommended fixes
- Treat the issue as a contamination and surface-preparation diagnosis before repeating polishing.
- Use a cleaner final route and controlled cleaning before the next coating-sensitive step.
- Avoid aggressive cleaning if the surface is delicate or coated.
Prevention
- Inspect after cleaning before plating, PVD, lacquer or decorative coating.
- Keep compound amount minimal and wheel condition controlled.