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I use mine with tools for a week or two (without re-lapping) and they're usually broken in. Some of the really fine ones seemed really coarse at first, probably because of whatever was used to lap...

That'd definitely be a lateral move or better. You just don't want to go from a 2k synthetic to a translucent arkansas, despite the hard ark being no finer than a 2k synthetic, its grooves are a lot...

There is a mismatch in the groove shape for a waterstone if you try to follow it by a fine oilstone. Alundum / Alumina and SiC waterstones cut narrow deep grooves. Following a medium waterstone with...

You probably don't hear about them because they work best on oil (which you don't generally have in your bathroom). Actually, they work fabulously on WD-40. Because to condition and level them, you...