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For the handle, could have removed the old wedge, then soak the handle in old oil. Makes the wood swell then fit the handle and make a new hard wood wedge and you are set.
The stain idea works better if you put it in a jar and let set for a day or two. Then apply to wood, for darker stain let dry and apply till you get the desired tone.
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We always used finger nail polish remover, they back out with then seconds.
How To Make a Cross Cut Sled for a Table Saw
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