Well the first 1/4 ply went on with a combination of clamps and lots of nails and lots of frustration as I underestimate the spring back force and the bend radius of the 1/4 ply. It went on but not pretty.

The good news is that I planned to cover that with 1/8 ply with the veneer on top.
I tried the a piece of 1/8 and it seems fine. However clamping it in place is the challenge. Cauls across are not going to cut it as I would not have a good distribution of pressure.

I was able to locate 1/8 bendy ply and bought a sheet. It does bend effortlessly. That stuff is dynamite. I rolled it and stuff it in my car without any problem. I wish I found it before I applied the 1/4 ply.
I am thinking contact cement for the 1/8 ply and roll it on.
The veneer will go with Hot Hide Glue.
The reason I am thinking to hammer the veneer flat is that it would be hard to use the hot iron to re-activate the glue on the concave surface. It’s easier on the convex surface.
I thought about bending the sole of my hot iron but I have yet to dismantle my iron to see how the heating element runs to see if it is feasible.

Abbas, Castro Valley, CA