old glass-fiber boat repairs

This old boat was heritaged to me from my father. He had bought it with his own father 1979 at Kangasala, to be able to go fishing. 
As time goes by and the boat has been stored outside, the plywood inside the motor support backplate had rotten and broke. I had to start repair work by opening the glassfibers and crack all of the old plywood away.

Softened plywood