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 How
should I prepare a large plywood surface for cover?
>Varnish the entire area using EV-400 Epoxy
Varnish. Do not use anything other than an epoxy varnish. Brush or
spray at least 2 coats on the surface. Allow the first coat to dry
to the touch before applying the second. The next step is to apply
Poly-Brush. After the varnish has thoroughly cured, you should brush
on one coat of Poly-Brush that has been reduced 3 parts of
Poly-Brush to 1 part of reducer. Allow this coat to dry. Then spray
on a second coat of Poly-Brush.
What
about attaching the fabric?
>You will attach the structure using Poly-Tak
cement. This means attaching it on leading and trailing edges, wing
butt ends, etc. Do not use Poly-Tak to apply the fabric onto the
surface of the plywood itself.
Do
I need to heat tauten the fabric after I have it attached?
>Definitely. You will heat tighten using a
household iron starting with a temperature of 225 degrees F. You
then will increase the temperature to 250 degrees F. This is the
final setting for heat shrinking over plywood surfaces.
What
holds the fabric to the plywood if I can't rib lace or attach it in
any other way?
>As you know, the fabric must adhere to the
plywood surface. This is particularly important on a lifting surface
such as a wing. Poly-Brush is applied over the fabric which then
penetrates through the fabric activating the Poly-Brush you have
applied directly on the plywood. Be sure you brush this coat of
Poly-Brush onto the fabric. After this step you follow the remaining
steps in the manual.
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