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Galvanized metal surfaces should be dry and
free of dirt, oil, grease, and other contaminants prior to painting:
- Allow galvanized metal to weather for
at least 12 months before coating. If weathering is not possible,
test patches should be applied and tested for adhesion, after
following the surface preparation methods below.
- Grease, oil, and other contaminants can
be removed per SSPC SP-1 Solvent Cleaning
- Remove all loose or peeling paint by scraping
and wire brushing; wear eye protection, gloves and a dust
mask; or by power washing with plain water, taking care to
not drive water into cracks or mortar joints.
NOTE, If lead is suspected in the paint, do not attempt to
scrape, sand, power wash, use heat gun, etc., which might
put lead into the environment, but rather contact a contractor
qualified for lead assessment and abatement
- Remove dirt, chalk, dust, treated mildew,
etc. by scrubbing with detergent and water, and rinse thoroughly;
or power wash with plain water.
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