Normally the small racing hydros don't get glassed. The edges need to stay sharp to help it track in the turns. They usually just get epoxied.
Looks to me like this is for a racing hydroplane. Clearly the drawings indicate a model R/C hydro. I wonder if he feels the current field of...
To have a real answer, you would need to use specified layup schedules to create test panels, then test each one according to the standard...
Owner doesn't know who the builder is. He thinks there were only two made, but it sure looks manufactured to me. Pretty cool.