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6.3.6
(continued)
E.
Patching the Remaining Area
Continue the repair by building up the remaining area of the hole with
pieces of fiber glass mat as instructed in Section 6.3, Procedures D
through G.
F.
Finishing the Surface
Complete the repair by finishing the surface of the patched area as
instructed in Section 6.3, Procedure H.
6.3.7
Repairing Holes Over 1/4 Inch in Diameter
Power sander
24 grit sanding disc
Sanding block
Rubber squeegee
Putty knife
Scissors
Stirring stick
Paintbrush
White cloth
Cellophane
B.
Sanding the Hole
1.
With the heavy duty sander and 24 grit sanding disc, sand
all sides of the hole outward at least 2 inches.
2.
Cup out the sanded area smoothly so that at least two
layers of fiber glass mat can be applied later.
C.
Applying the Backup Patch
1.
From outside the structure being repaired, fasten a piece of
cardboard and cellophane over the hole as instructed in 6.3.5,
Procedure H, Steps 2 through 5.
NOTE:
The cardboard serves as a backing against which the milled-fiber
putty can be applied from outside the structure. (Step 2, below).
TOOLS
Fiber glass mat
MATERIALS
Fiber glass cloth
Resin
Catalyst
Sandpaper 50 & 100 grit
Cardboard
Acetone
Woven roving
Masking tape
Milled fibers
SECTION 6
Page 27
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