Cause Lack of inter-coat adhesion can occur if paints are applied to old hard and glossy paint films. Salts which were formed during the life of the previous coat were not removed before the new coat of paint was applied. These salts form an invisible film preventing a bond with a new topcoat. This leads to loss of adhesion and peeling.
Solution Sand surface and wash all protected areas with a strong detergent solution and water. Rinse thoroughly with clean water and allow to dry.