What are some of the methods people use for flattening bench stones? Particularly the man made Japanese water stones. I have used an extra course diamond stone. I recently bought a rough water stone because the above diamond stone was taking forever to flatten the back of a plane blade and i figured the water stone never really loses cutting ability. Now that i had 2 water stones i tried rubbing them together and it seemed to take out the dish and a lot faster than the diamond stone (do these wear out? after less than 2 years?) But i cant really tell if the stones are flat, just that they have full contact between each other. One could be convex and one concave.
A local kitchen countertop place sells granite sink cutouts. Is it possible to flatten granite w/o power tools? I was thinking the bench stone could flatten itself from its slurry on top of the granite? RUb the coarse stone on it first to get a more aggressive slurry. I can't do this on the diamond stone because I have determined after several days of trying to flatten a block plane on it that not only has its cutting ability severely waned very quickly; it is not flat either.
thanks