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7
Spraying
NOTE: When spraying block filler, mastics or high solid
coating, remove the gun filter and high pressure
filter screens.
Spraying Technique
The key to a good paint job is an even coating over the entire surface.
This is done by using even strokes. Keep your arm moving at a
constant speed and keep the spray gun at a constant distance from
the surface. The best spraying distance is 10 to 12 inches between
the spray tip and the surface.
Keep stroke smooth and at an even speed.
Even coat throughout
Approximately
10 to 12 inches
Keep the spray gun at right angles to the surface. This means moving
your entire arm back and forth rather than just flexing your wrist.
Heavy Coat
Do not flex wrist while spraying.
Light Coat
Light Coat
Keep the spray gun perpendicular to the surface, otherwise one end
of the pattern will be thicker than the other.
Approximately
10 to 12 inches
Right way
Wrong way
The spray gun should be triggered by turning it on and off with each
stroke. This will save paint and avoid paint buildup at the end of the
stroke. Do not trigger the gun during the middle of a stroke. This will
result in an uneven spray and splotchy coverage.
Proper way to trigger the spray gun
Approximately
10 to 12 inches
Keep stroke
even
Start stroke
End stroke
Pull trigger
Release trigger
Keep steady
Overlap each stroke by about 30%. This will ensure an even coating.
When you stop painting, lock the gun trigger lock, turn the pressure
control knob counterclockwise to its lowest setting and set the
PRIME/SPRAY valve to PRIME. Turn the ON/OFF switch to the OFF
position and unplug the sprayer.
Practice
1. Be sure that the paint hose is free of kinks and clear of objects
with sharp cutting edges.
2. Turn the pressure control knob counterclockwise to its to its
lowest setting.
3. Move the PRIME/SPRAY valve to the SPRAY position.
4. Turn the pressure control knob clockwise to its highest
setting. The paint hose should stiffen as paint begins to flow
through it.
5. Unlock the gun trigger lock.
6. Trigger the spray gun to bleed air out of the hose.
7. When paint reaches the spray tip, spray a test area to check
the spray pattern.
Good spray pattern
Paint tailing pattern
8. Use the lowest pressure
setting necessary to get a
good spray pattern. If the
pressure is set too high, the
spray pattern will be too light.
If the pressure is set too low,
tailing will appear or the paint
will spatter out in gobs rather
than in a fine spray.
