Steps
1. With a sharp routing tool, grind out defective
area.
CAUTION:
Do not leave any undercut edges. Feather in the defective
area.
2.
Blow out residue with air hose and wash with clean acetone.
3.
Build up laminate area with 2 oz. fiberglass mat or equivalent
using catalyzed laminating resin common to the original
lamination. Apply in an even coat making repair area the
same thickness as surrounding laminate. Permit to gel and
then knife-trim excess glass and resin.
CAUTION:
Build up laminate in stages. Do not build up more than 2
plies of 2 oz. mat at one time to avoid excessive build-up.
4.
Permit laminate patch area to cure a minimum of three hours
at 70º F.
5.
Sand resin and glass area with dry 280 grit sandpaper to
remove glass whiskers and provide uniform surface. Blow
area clean with air hose followed by a clean acetone wash.
6.
Proceed as outlined in "Deeper Defects-Routing"
Steps 4 through 7.
PRECAUTIONS
1. Use
the same production batch of Gel coat as used in the original
part. It is a good practice to draw off one gallon from
the drum being used in production for future repair application.
Be sure to agitate prior to drawing off.
2.
Damaged area may be too severe to repair in one step and
may require stages. Excess coating applied at one time will
create excess exotherm heat which will cause the surface
to shrink.
3.
Let each layer cure prior to applying subsequent layers.
4.
Clean with a good quality, clean acetone.
3.
Do not use in excess of 2.5% (wt.) or less than 1% (wt.)
MEKP in catalyzing the Gel coat for patching purposes.
4.
Heat lamps, heat guns or space heater may be used to speed
patching process and make repairs in cold working conditions,
CAUTION:
Do not overheat. It may cause blistering and poor color
matching.
5.
Spray patches usually match better than spot patches. In
general, keep all patches as small as possible.
6.
Additives to the gel coat may cause color changes.
