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SYMPTOM
Microblistering in the form of hand marks, finger prints or streaks.
Microblistering over a complete panel.
CRUSE
Contamination by hand contact or oily material after the pretreatment stage.
Inadequate pretreatment ie. no phosphate coating and/or omission of electro-coat primer (No facilities).
RECTIFICATION
Strip to metal. Clean with Deoxidine. Etch prime before applying undercoat and colour.
As above.
Note: The larger manufacturers are now becoming equipped to apply the phosphate pretreatment and electrocoat primer to spare panels (for both production line and dealership replacements), so this problem will become less acute.