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 I
thought we were supposed to brush on Poly-Brush. Now you are talking
about spraying it on. What's the deal?
>The first coat of Poly-Brush should be brushed on
the surface. After that, you will want to spray additional coats.
That will prevent brush marks from showing through on the final
finish.
I
have never sprayed anything before. Should I find someone to spray
this on for me?
>You will find that with a little practice you can
spray Poly-Brush very easily. It is a viscous material not prone to
runs. Practice spraying on pieces of cardboard, wood, practice
fabric panels, etc. before you begin on the real thing. Pick a small
part such as an elevator on which to start. Within a short period of
time you will be spraying like a pro.
What
kind of spray gun should I use?
>We recommend one of the HVLP (High Volume Low
Pressure) spray outfits. They are easy to work with and use a lot
less material than a pressure gun. Regardless of what you use be
sure the equipment is of good quality. A cheap spray gun will cause
a lot of problems.
Should
I wear anything to protect my lungs while spraying?
>Absolutely! Be sure you wear at least a high
quality charcoal filtered respirator. If you have a fresh air
breathing system then use it. Protect your lungs from the spray
mist.
Do
I have to have a spray booth to apply Poly-Brush?
>No, it would be nice if you did but not
necessary. Just remember you will get overspray on objects around
where you are spraying. Be sure the area is well ventilated and that
you have plenty of light.
Should
I thin it before spraying it on?
>Yes, thin it 1 part reducer to 3 parts of
Poly-Brush. Take a paint stick and mark 4 equal marks on it using a
magic marker. Then you can pour Poly-Brush up to the 3rd mark and
then reducer up to the 4th mark. You now have a 3 to 1 ratio.
What
type of reducer should I use?
>If the temperature is below 85 degrees F then use
R65-75 reducer. If above 85 degrees F use R8500 reducer.
What
is the minimum temperature I should have before I spray Poly-Brush?
>The absolute minimum temperature to spray is 60
degrees F.
How
many coats of Poly-Brush should I spray on?
>We recommend a minimum of 2 sprayed on coats, not
cross coats. Start by spraying a medium coat. Wait at least two
hours, then spray another coat.
When
I sprayed on the first coat it dried rough like sandpaper. What's
wrong?
>Excessive heat or inadequate thinning is causing
the Poly-Brush to dry before it reaches the surface. Add about 2
ounces of retarder BR8600 to each quart of reduced Poly-Brush.
While
I was spraying I got a run on the piece. Should I try to remove it?
>If you see the run while it is wet use reducer on
a brush and immediately brush it out. If it is dry then carefully
wipe it off with reducer on a rag. You must then respray over the
area. You cannot sand Poly-Brush. You must get the run removed
before going on.
While
spraying the leading edge of my wing, I noticed small pinholes
forming. What should I do?
>To fix pinholes you must rub the area with a soft
cloth and some reducer. The rubbing action will soften the
Poly-Brush forcing it into the unfilled weave. Then respray the area
with Poly-Brush adding 1-2 ounces of retarder.
How
long should I wait between coats?
>Let the first coat of sprayed on Poly-Brush dry at
least 2 hours before applying the second coat. After the second coat,
allow the surface to dry overnight.
I
can only spray one side of a wing at a time. My wings are on
sawhorses. How long should I let one surface dry before turning it
over to do the other side?
>Let it dry at least overnight before moving it.
This will preclude any indentations on the newly sprayed side.
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