Professional Detailing2 min read

Coating Weathering Reports: Separate Surface Cleaning from Evaluation

Cleaning a weathered specimen before measurement can change what the evaluation reveals. Define whether the assessment concerns the exposed surface as received, the surface after an approved cleaning step, or both.

Updated · NANOLAB Knowledge

The key distinction

Dirt and removable deposits may influence appearance, while cleaning can also change the specimen. A clear protocol preserves the order of operations and the reason for each step. The result should state which surface condition was measured so that a reader does not confuse easy cleaning with unchanged appearance during exposure.

Practical checks

  1. Agree the evaluation sequence and permitted cleaning method before exposure.
  2. Photograph and document the as-exposed condition when required by the plan.
  3. Label post-cleaning results separately and record the cleaning procedure used.

Example

Illustrative example: a panel looks dull after outdoor exposure but improves after cleaning. Reporting only the improved value hides the maintenance step. Reporting both conditions can answer two different questions: what the surface looked like after exposure and what appearance remained after the defined cleaning process.

Scope and limits

Do not clean away evidence before the laboratory has completed required observations. A cleaning response does not identify every cause of change or prove unlimited durability. Claims should reflect the actual evaluated condition and any maintenance intervention needed to obtain it.

Related guidance

Ask NANOLAB about the exact product and intended use. Use the current product documentation for formulation-specific instructions.