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Swirl Density and Scratch Depth: Describe Two Different Polishing Questions
A panel with many fine marks can look worse than one with a single prominent line. Record defect distribution separately from an assumption about depth or removability.
Updated · NANOLAB Knowledge
Describe what is visible
Inspect prepared, dry paint under a repeatable light. Record whether marks are widespread, isolated, concentrated around contact areas or associated with a repair. Do not translate visual density directly into a heavy-cut requirement.
Avoid unsupported depth estimates
A photograph or a dramatic reflection does not measure the remaining finish. Review the paint history and relevant measurement limits. Keep unknown depth as unknown instead of using a percentage or severity label that implies a measurement you have not made.
Choose a representative trial
Use a test area that reflects the service objective. If widespread swirls and isolated deeper marks coexist, assess the overall finish and the isolated marks separately. A successful enhancement of the general surface may leave some lines intentionally retained.
Quote the verified outcome
State the intended improvement, exclusions and inspection conditions. Keep the number of correction stages connected to the demonstrated result. A busy-looking panel does not automatically need more aggressive abrasion than a less marked panel with uncertain paint history.
Frequently asked question
Can a swirl-count score determine scratch depth?
No. It can describe a defined visual observation, but it does not establish paint-layer depth or a suitable compound recipe.