Columbia Coronado 25 Owenrs Manual page 91

6.2.4 (continued)
B. Preparing the Surface
1. Remove all the damaged gel coat surrounding the air bubble
(or "air void") with a putty knife. The damaged gel coat
chips off easily. when you apply pressure to the putty
knife. Don't stop chipping until you have worked your way
back on all sides to gel coat that is undamaged, sound, or
firm.
2. Clean the resulting void thoroughly with a white cloth
saturated with acetone. If the void is not cleaned properly, a
black ring will appear around the area after it has been
patched.
C. Preparing the Patch
1. Make a smooth, thick, manageable putty by mixing Cab-o-sil and a
matching gel coat. Mix thoroughly until all lumps have been
removed.
IMPORTANT
If all lumps are not removed from the putty they will trap air that in turn
will leave tiny pin holes in the area being patched. The lumps also will
appear as white spots in the patched area.
2. Add catalyst to the putty in accordance with the
manufacturer's instructions. Mix thoroughly so that no
uncured spots will occur in the patched area on the unit.
D. Patching the Void
See Section 6.2, Procedure D, Steps 2 thru 6.
E. Sanding the Patch
See Section 6.2, Procedure E.
F. Buffing the Patch
See Section 6.2, Procedure F.
G. Spraying the Patch
If the gel coat has been sanded through during Procedure E above (that is
the fiber glass is visible) you must spray the area with a finishing
coat. For the proper finishing procedures see Section 6.9.
SECTION 6
Page 11