Columbia Coronado 25, Owenrs Manual

Page: 105 / 115

SECTION 6
Page 25
6.3.6 (continued)
C. Inserting the Back-up Patch
1. Cut a piece of cardboard so that it overlaps the hole at
least one inch on all sides.
2. Insert a piece of wire through the cardboard, in a U-shape,
so that the wire enters at one end of the cardboard, passes
along the length on the reverse side, and comes back to the
front at the opposite end.
3. Insert the cardboard through the hole.
4. Pull the ends of the wire toward you to determine whether the
piece of cardboard comes in complete contact with the hole from
the underneath area. If the cardboard does not come in complete
contact with the hole, remove and properly shape the cardboard
with your hands so that it conforms to the hole. Then insert it
through the hole again to determine whether it is flush against
the hole.
IMPORTANT
The cardboard must be removed from the hole and reshaped as many times as
necessary until it conforms perfectly. This procedure is necessary for
the area to be restored to its original structural soundness.
5. When the cardboard has been properly shaped, remove it
from the hole.
6. Remove the wire from the cardboard.
7. Make a backup patch fox the hole by cutting a piece of
fiber glass cloth and mat to the size of the cardboard.
8. Place the piece of cloth on top of the cardboard and the mat
on the top of the cloth.
- 9. Wet out the patch by applying catalyzed resin (see
Chapter 6.3, Procedure E, Step 1) to the cloth and mat
with a paintbrush. He sure to work out all the air
bubbles as you go.
10. Reinsert the wire through the cardboard and the fiber
glass patch.