Cagey
Mythical Status
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What do you mean by "warp"? Is it twisted? If so, you may as well give it to the dog as a chew toy. Or, you could wait until winter and if you have a wood stove or a fireplace, use it to generate some heat. Hardwoods burn hot and slow. In any event, there's no sense wasting storage space for it. It needs to go bye-bye.
If it's just warped along its length so that it has too much back-bow or relief for the truss rod to eliminate, that's surprisingly easy to cure. You need a very firm and straight piece of square steel tube stock, and you clamp that along the fretboard with some shims in strategic places to bend it the way you want it to end up, and stuff it in an oven at 175°F for an hour. Let it cool for a couple/few hours after you remove it and It'll follow the curve your shims describe for ever and ever, amen.
Be sure to pull the tuners off before you do it, and maybe knock off the nut if it's plastic, but don't worry about the finish. Even lacquer will survive that temperature. Just be sure to pad the clamps so they don't leave dents, as the finish will soften while it's hot.
If it's just warped along its length so that it has too much back-bow or relief for the truss rod to eliminate, that's surprisingly easy to cure. You need a very firm and straight piece of square steel tube stock, and you clamp that along the fretboard with some shims in strategic places to bend it the way you want it to end up, and stuff it in an oven at 175°F for an hour. Let it cool for a couple/few hours after you remove it and It'll follow the curve your shims describe for ever and ever, amen.
Be sure to pull the tuners off before you do it, and maybe knock off the nut if it's plastic, but don't worry about the finish. Even lacquer will survive that temperature. Just be sure to pad the clamps so they don't leave dents, as the finish will soften while it's hot.