Polyester Putty Adhesion Loss
Loss of adhesion between polyester putty and the substrate.
Cause:
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The substrate was not properly prepared (main cause).
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Incorrect use of an infrared dryer.
Correction:
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Sand the damaged area and redo the repair.
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Before applying the putty, it is best to clean the existing paint surface with a silicone remover. If the paint color fades, sand the existing paint surfaces to ensure a good adhesion surface.