Description of problem:
Sanding marks or swirls show through after the polishing operation.
Causes:
- Topcoat is not through dried.
- Sanding paper is too coarse.
- Unsuitable polish.
- Unsuitable equipment.
- Polishing through on edges.
Preventive measures:
- Dry topcoat thoroughly (rebake if necessary).
- Use suitable polish and equipment.
- Use appropriate sandpaper.
- Use polish free of ammonia.
Remedy:
- Thoroughly dry top coat. Sand and polish or repaint.
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