Warped grand piano lid

[Clark]

Another thought, if Willem's suggestion isn't successful, you might be able to
use some scrap plywood as cauls and evenly heat them up fairly hot. Maybe after a
while with plain cauls, you can start building them up to counter the warp and
anticipate bending it past where you want it to end up.

Unless the glue already stinks, the veneer should stay put unless you add a lot
of moisture (a la leaky trash can).

Clark