: Hullo, I'm seeking information on behalf of a Mr Ed Kinbacher on techniques
: for constructing kayak paddles utilizing carbon-fibre. The paddles have to
: stand up to rough treatment in very rocky environments. Any assistance or
: advice would be most appreciated.

Carbon fiber by itself is not particularly tough. It tends to be brittle. You can increase toughness by adding other materials to the lamination, such as glass, nylon, polyester cloth, or dynel.