Galvanised metal has a zinc coating, designed to protect it from the weather. Unfortunately, normal paint doesn’t adhere very well to zinc, so you need a specialist primer.
Remove all visible signs of organic growth and treat the areas with Zinsser Mould Killer in accordance with the manufacturer’s instructions. Allow to dry.
Ensure the surface is free from any contaminants and anything that could interfere with adhesion then degrease overall with methylated spirit frequently changing the cloth. Prime all bare metal with one full coat of Bulls Eye® 1-2-3 Primer Sealer in accordance with the manufacturer’s instructions. Allow a minimum drying time of 1 hour in normal drying conditions.
For interior projects decorate with two full coats of Perma-White® Matt, Satin or Semi-gloss in accordance with the manufacturer’s instructions. Allow a minimum drying time of two hours between coats. For exterior projects decorate with two full coats of AllCoat® Exterior Satin or Gloss in accordance with the manufacturer’s instructions. Allow a minimum drying time of one hour between coats.
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