: Right, I should have been more specific. The plywood I have is called 5.2 mm
: by the big box. I haven't measured the size but calling it 1/4" is
: close enough.

: Several years ago I worked in a custom furniture and cabinet shop. We often
: built curved pieces using luan core and heavy veneers. The luan first went
: through a sander. Resulting in a thickness that I can not replicate. The
: thin luan and solid veneer then was laid up on form built for that
: specific piece.

: So bent laminations like this, I think, might be out as a possibility.

: I think I like the idea of relieving the backside and filling it. A steam
: test resulted in delamination after several minutes with no appreciable
: effect on flexibility.

: Thank you for your thoughts!

Try a cold soak test too, make sure the glue is waterproof. You really don't want to play with ply in boats that's glued up with non-waterproof glue. The epoxy "mostly" waterproofs the ply, but you still get some vapor into and out of the ply.

Bill H.