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I used to have a Carborundum razor hone.

What i meant was an Aluminum cookie sheet/pan. I suppose you could buy a new one if you wanted. I would think that something harder would be more precise though.

Yeah, silicon carbide powder works well on a flat surface like a piece of glass or a marble tile, some people even use a cooky sheet from the thrift store on a cement floor. I go up to 500 and then...