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Step
8:
Wash and wipe the primed surface with a recommended solvent
to remove dust and contaminants.
Step
9: Prepare the high-build polyester topcoat by adding
2.0-2.5%, by weight, of MEKP peroxide catalyst and mix thoroughly.
Then dilute with a recommended solvent as required. Remember
to catalyze only the polyester and not the solvent.
Example-
20:1 or 10:1 topcoat to solvent by volume. Mix only the quantity
that can be sprayed within 30-45 minutes. For longer pot-life,
increase the portion of solvent slightly as required. Never
exceed 50% solvent.
Step
10: Spray the entire surface with a wet mist layer (2-3mills)
at the lowest air pressure that will allow adequate atomization.
Wait 1-2 minutes for the solvents to flash off.
Apply
the second coat to cover and hide the primer or existing substrate.
Wait another 2 minutes and apply the flow coat, which should
look wet and glossy.
Each
of the three layers must look wet. There will be no gloss
retention loss from wet to dry. To enhance the cure, use heat
and air.
Do
not exceed 10 mills per application.
If
higher build is required, allow to cure, then sand and build
10 additional mills.
The
topcoat will dry to a hard and glossy finish without additional
sealants.
Dust
particles can be easily removed by sanding or buffing slightly.
Step
11: Allow 6-8 hours at normal room temperature for curing.
The application of mild heat will accelerate the cure. When
fully cured, final finishing can be carried out by lightly
sanding with 600-1200 grit sandpaper. Wet sanding is recommended
unless wood is exposed.
Do
not sand the sharp radii. Buffing these areas will eliminate
the possibility of removing the coating. Placing masking tape
over the radii when sanding will protect them adequately.
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