In the old days, I was taught to sharpen a scythe with a hammer and a stake anvil. blades get dull when the edge is turned-cold hammering returns it to shape without the loss of metal incurred by grinding and filing...
...and you get to whack something with a hammer, which might be therapeutic, IMHO, after a full day riding herd on young paleontologists. YMMV.
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Dance like you have never been hurt, work like no one is watching,love like you don't need the money.