Columbia Coronado 25, Owenrs Manual

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SECTION 6
Page 16
6.3 FRACTURE AND PUNCTURE REPAIRS
6.3.1 Basic Procedures for Repairing
Fractures and Punctures
The purpose of this chapter is to give you the basic procedures for
repairing fractures and punctures (holes) in the fiber glass (that is,
below the gel-coat surface) of a fiber glass product or part. Sections
6.3.2 thru 6.3.7 give specific variations in the basic procedures according
to the type of fracture or hole.
IMPORTANT
To determine how to repair a fracture or puncture, refer first to the
appropriate section.
Fractures are classified as (1) simple fractures, which do not penetrate
the fiber glass structure and (2) compound fractures which do penetrate
the structure but which can be reached from both outside and inside the
structure (Section 6.3.3) or only from the outside (Section 6.3.4).
Punctures are classified as (1) holes that can be reached from both
inside and outside the structure (6.3.5) or only from the outside of the
structure (6.3.6) and (2) holes that are larger than 1/4 inch (6.3.7).
TOOLS MATERIALS
Power sander Fiber glass mat
24 grit sanding disc Fiber glass cloth
Sanding block Resin
Rubber squeegee Catalyst
Putty knife Sandpaper 50 & 100 grit
Scissors Gel coat
Stirring stick Cab-o-sil collodial silica
Paintbrush Cardboard '
White cloth Acetone
Cellophane Woven roving
Wire Masking tape
Stick Milled fibers
B. Removing Damaged Fiber Glass
1. Remove the damaged fiber glass from the fractured area or
puncture with a power sander and 24 grit sanding disc. To
restore the strength to the damaged area you must sand outward
(on all sides) from the fracture or puncture at least 2". This
technique allows the subsequent fiber glass patch to bond to
structurally sound material. Also, be sure to cup out the
sanded area smoothly so as to achieve a smooth,
even buildup.