PIPER CHEROKEE SIX / LANCE SERVICE MANUAL
IV - STRUCTURES
07/15/06
1F16
d.
Work the mixture of resin, fibers and catalyst into the damaged area, using the sharp point of a putty
knife or stick to press it into the bottom of the hole and to puncture any air bubbles which may be
present . Fill the scratch or hole above the surrounding undamaged area about 1/16 inch.
e.
Lay a piece of cellophane or waxed paper over the repair to cut off air and start the cure of gel
mixture.
f.
Allow the gel to cure 10 to 15 minutes until it feels rubbery to the touch. Remove the cellophane
and trim flush with the surface, using a sharp razor blade or knife. Replace the cellophane and allow
to cure completely for 30 minutes to an hour. The patch will shrink slightly below the structure
surface as it cures. (If wax paper is used, ascertain wax is removed from surface. )
g.
Rough up the bottom and edges of the hole with the electric burr attachment or rough sand paper.
Feather hole into surrounding gel coat, do not undercut.
h.
Pour out a small amount of resin, add catalyst and mix thoroughly, using a cutting motion rather
than stirring. Use no fibers.
i.
Using the tip of a putty knife or finger tips, fill the hole to about 1/16 inch above the surrounding
surface with the gel coat mixture.
j.
Lay a piece of cellophane over the patch to start the curing process. Repeat step f, trimming patch
when partially cured.
k.
After trimming the patch, immediately place another small amount of gel coat on one edge of the
patch and cover with cellophane. Then, using a squeegee or the back of a razor blade, squeegee
level with area surrounding the patch, leave the cellophane on patch for one or two hours or
overnight, for complete cure.
1.
After repair has cured for 24 hours, sand patched area, using a sanding block with fine wet
sandpaper. Finish by priming, again sanding and applying color coat.
4-22.
FIBERGLASS FRACTURE AND PATCH REPAIRS
a.
Remove wax, oil and dirt from around the damaged area with acetone, methylethylketone or
equivalent.
b.
Using a key hole saw, electric saber saw, or sharp knife cut away ragged edges. Cut back to sound
material.
c.
Remove paint three inches back from around damaged area.
d.
Working inside the structure, bevel the edges to approximately a 30 degree angle and rough-sand
the hole and the area around it, using 80-grit dry paper. Feather back for about two inches all
around the hole . This roughens the surface for strong bond with patch.
e.
Cover a piece of cardboard or metal with cellophane. Tape it to the outside of the structure,
covering the hole completely. The cellophane should face toward the inside of the structure. If the
repair is on a sharp contour or shaped area, a sheet of aluminum formed to a similar contour may be
placed over the area. The aluminum should also be covered with cellophane.
f.
Prepare a patch of fiberglass mat and cloth to cover an area two inches larger than the hole.
g.
Mix a small amount of resin and catalyst, enough to be used for one step at a time, according to kit
instructions.
Summary of Contents for Cherokee LANCE
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