TechnicianVision · Knowledge base
Back-To-Basics: Contour Mapping
I-CAR · July 30, 2018
Summary
This article explains the causes of contour mapping, which is a refinishing defect where the repair area remains visible through the basecoat and clearcoat. It outlines how improper featheredging, incorrect body filler application, hard tape lines, and primer shrinkage into deep sand scratches contribute to this failure.
What to do on the job
Follow abrasive and paint manufacturer standard operating procedures (SOPs) for proper featheredging, sanding grit progression, and primer blending to prevent repair mapping.
How to use it
Use this document to justify the necessary time and materials required for proper surface preparation, correct sanding grit progressions, and adequate blending/masking areas during the refinishing process to prevent paint defects.
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