KITE BOAT REPAIRS

At this stage of kite sailer development hulls are most easily built of
glass fibre and polyester over polyurethane foam.  A limited amount of
hull skin damage will not seriously effect strength of performance.  The
foam is relatively water resistant but should still be dried thoroughly
before effecting repairs.  The big advantage to this form of
construction is that it suits one-off building, doesn't require moulds. 
The disadvantage is the extreme time input required to get a fine finish.

Fin Damage

Fins inevitably suffer leading edge damage when you run into
obstructions.  Usually it is sufficient to reshape the damaged area with
sandpaper etc.  Severe damage requires rebuilding.  Leaving the
kitesailer fins stuck into the sand in breaking surf can break the fins
off.  Water forces are enormous.