Ok guys I bought some cherry one side plywood today .
It was stood on end and has a wrap.
If I stand it on end tops touching the wall
is is 6inches from the wall at the floor.
Anything I can do to get it back in a usable state?
Perhaps one side, the outside of the bow, absorbed more moisture than the other? If one side was against a wall, it can gather moisture in from an outside wall. Can also may get more heat and air on the room side and less on its wall side, doing the same effect.
Just got back from the gunshow and read about your plywood. Plywood or board, if it bows just throw it out on the grass with the crowned side up and watch it. When it flattens out get it out of the sun and store properly. Moisture is your problem.