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1.
Be sure that the part being surfaced does not have substrate
cracks that have not been repaired. Otherwise surface cracking
may occur.
2.
For superior adhesion, apply primer to all parts to be surfaced.
Do not take shortcuts by applying the topcoat directly to
the substrate even if it is in apparently good condition.
3.
When spraying, keep the gun far enough away from the surface
so that the pressure from the atomizing air fan does not ripple
the coating. This will minimize subsequent sanding. Use the
lowest possible air pressure while still achieving a good
spray pattern.
4.
A siphon gun, with a material flow regulator, is recommended.
Larger jobs can be sprayed with airless equipment using a
paint tip (.013in.) designed for low viscosity materials (300-500
CPS)
5.
Spray the coating in work areas where dust is at a minimum.
6.
If, during buffing, the surface remains dull, either allow
more time for post-curing or expose to heat. Review the entire
procedure before repeating it on another application.
7.
First, wipe down the mold surface with a solvent.
8.
Use a recommended solvent to dilute either polyester primer
or topcoat.
9.
The purpose of adding the solvent is to increase the pot-life
as well as to reduce the viscosity.
10.
Do not attempt to use this type of system at or below 50°
F.
11.
Most unsaturated polyesters are not recommended for total
immersion in water or other liquids.
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