1. Probable Cause / Reason:
•    Insufficient primer film thickness over rough surface profile
•    High surface profile peaks left uncoated or underprotected
•    Presence of holidays (missed areas during painting)
•    Exposure to moisture or humidity before full curing

2. Correction:
•    Inspect and identify all affected rusted areas
•    Mechanically clean or abrasive blast to remove rust
•    Reapply primer with sufficient thickness to fully cover the profile
•    Follow up with complete coating system as per specification

3. Corrective Action / Prevention:
•    Apply primer at recommended film thickness, especially on rough surfaces
•    Ensure full coverage with no holidays or missed areas
•    Check surface profile compatibility with coating system before application

BG GROUP OF PAINT AND COATING CONSULTANT
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