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Smith’s is sold at Lowe’s and Ace hardware, here in California, but not all of them carry it. A lot of knife stores carry it.

Sells for about 5-6 bucks, one bottle lasts a long time. I put it in...

All the methods described work well.

I use lose 60 or 80 grit Silicone carbide in a large cookie sheet with soapy water on a flat-ish piece of concrete. It will get you to reasonably flat much...