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Step
5:
Prepare primer by adding 1.25-2.5% by weight of MEKP peroxide
catalyst and mix thoroughly. Dilute with a recommended solvent
at the rate of 10 parts by volume of primer to 1 part by volume
of solvent. Prepare only the quantity that can be sprayed
within 30-45 minutes. If longer pot-life is required, slightly
increase the portion of solvent.
Do
not exceed 25% solvent
Step
6: Apply a wet first coat (4-6 mills) to the entire surface,
allowing the solvent to flash off for 1-2 minutes. Then continue
to build up to the desired thickness in 5-mill passes.
Do
not exceed 30 mills per application.
The
primer coat will be dry to the touch in 45-60 minutes. For
best results, allow it to cure 6 hours at room temperature
at 77° F., at which time it will be ready for sanding.
After
a one-hour cure at these temperatures, you may accelerate
the cure by applying air and or heat.
Do
not exceed 130° F.
Never
coat with PVA or other sealants. Air is needed for the curing.
Step
7: Sand the entire primed surface to the desired finish
with 80-180 grit sandpaper. Remove all orange peel from the
primer, since it will transfer to the surface after the topcoat
has been applied. Because primer sands so easily, do not bear
down hard with the sandpaper.
The
primer may be buffed and prepared for a quick mold. However,
to achieve the mirror image the top coat must be applied.
Dry
sand for best results.
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