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6.3.6
(continued)
11.
Insert the cardboard through the hole.
12.
Pull the wire toward you until the patch is flush against
the hole. The fiber glass cloth and mat should be in
complete contact with the hole from the underneath area.
13.
Place a stick across the sanded area.
14.
Tie the ends of the wire around the stick to hold the
backup patch securely in place.
NOTE:
This patch serves as a backing against which additional layers of
fiber glass patching can be applied.
15.
Allow the patch to cure.
16.
When the patch has cured, separate the wire from the
stick.
17.
Cut off the ends of the wire as soon as possible to the
patch.
18.
Remove the remaining visible ends of the wire with the
power sander.
D.
Sealing the Backup Patch
1.
Mix resin and milled fibers in equal proportions.
2.
Add catalyst to the mixture in accordance with the
manufacturer's instructions.
3.
With a putty knife, apply the catalyzed mixture
around the corners where the backup patch comes
in contact with the hole to seal off any sections
of the hole that have not come into complete contact
with the backup patch.
9.
Allow the mixture to cure.
5.
when the mixture has cured, feather or roughen
up the area lightly with the power sander and
29 grit sanding disc. Be sure to cup out the
sanded area smoothly so that a smooth, even buildup
can be achieved.
SECTION 6
Page 26
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