Warped Bed Panels

I am sure this topic has been discussed, but for the life of me I can not find a thread where anyone was successful in making the bed panel straight again.  Has anybody been successful in doing so, and if that's a yes, please share how you did so.

Thanks,
Will

I have a write up on here somewhere using a bed rail, worked awesome, search

Didit

JL Weld a piece of angle iron on it.