Causes

New, bright condition galvanised (zinc coated) metalwork provides a surface to which paint does not readily adhere. In order to ensure the satisfactory adhesion and long term performance of any subsequently applied paint system, a pre treatment etch primer is recommended.

Solution:

Wash with hot water and liquid detergent solution to remove all oil/grease and any other contaminants, frequently changing the water. Rinse thoroughly with clean water to remove all residues. Allow to dry. Pre-treat all areas to be decorated with an application of a suitable Passivating Wash. This pre-treatment will blacken the galvanising and confirm satisfactory surface degreasing. Apply one coat of Crown Trade Universal Primer within 48 hours.