Identify whether a visible line is dirt, a clear-coat edge, basecoat exposure, or a color mismatch before trying to feather it away.
Decide whether a scuff needs cleaning or a complete texture repair before flattening molded plastic.
Evaluate probe seating, substrate and repeatability before using a paint reading to plan abrasive correction.
Compare approved wet and dry clear-coat sanding systems by equipment, inspection, cleanup, and the final polishing result.