What needs to be clarified
Assess whether the two measurement sets are comparable and which coating conclusions the records support, without treating one high reading as proof of a past vehicle collision.
Materials to prepare
- Both inspection records with measurement-point maps and original readings
- Thickness-gauge and probe identification and accuracy-verification documents
- Panel photographs and information on substrates and repairs between inspections
What to compare
Measurement positions, units, instrument ranges and probe suitability for each substrate are compared. Repeated readings and instrument checks are reviewed, distinguishing adjustment from calibration. Different locations and possible intervening changes are listed separately; an average does not replace the description of variation and local panel features.
Possible outcome of the analysis
A comparison table may identify genuinely comparable readings, methodological gaps and questions for a further inspection. Sufficient records may support qualified conclusions about coating variation in the examined areas.
Limits of the conclusions
Coating thickness alone does not establish the cause, date or extent of repairs. Without original readings and panel information, the discrepancy between inspections may remain unexplained.