How do you repair a dent in a wood shaft?
If the dent really is a “dent” (where the wood fibers have been compressed) and not a “gouge” (where wood has been removed), try putting a drop of water on the dent (e.g., with a cue tip) and let it sit and dry over night. This usually helps swell the fibers back up, restoring the shaft close to the pre-dent condition. If it doesn’t work completely the first time, try again. If the dent pops out too much, lightly sand with very-fine-grit sand paper.