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I've tried (with success) soaking one side of a cupped beech worktop protector to straighten it out.
As the deformation is caused by an impact it should be possible to put it straight, but probably not using a method devised to correct natural warping. I'd try routing a slot into the top and/or bottom and epoxying in a steel T section - clamp the door so it's flat while the epoxy is curing, or slightly bowed the other way to overcompensate as it'll relax once the clamps are removed.
Has anyone here ever straightened out a warped pine door? My front door doesn't close flush with the door frame on one side since it was once smashed open.
I've read you can soak in water and then leave with a large weight pressing it down (a bit like putting paper under heavy books), but I've no idea if this would work. Door is Victorian and I would prefer to keep it rather than replace.