Loss of adhesion can manifest itself in 2 different ways. First – where a total lack of adhesion occurs below the entire paint film. Second – where a lack of adhesion occurs between coats.
Loss of adhesion can occur when:
To avoid the result of loss of adhesion to the substrate, always use the correct type of primer and/or surfacer for the substrate (e.g. for aluminium, steel or plastic etc.). Only apply primers as per specification (see Technical Data Sheets or Tech Data on the cans.) Do not apply coats too thick. Thoroughly clean the substrate before application of paint materials.
Remove all coats with poor adhesion. Thoroughly sand and clean the substrate. Repaint using the correct choice of primer and/or surfacer and/or top-coats.