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Yes, draw a grid, like tic tac toe with a pencil and lap them. I find it best to do this in the kitchen sink under lightly running water. There is a tutorial on it here.

Lynn used the norton 1k for bevels, lapping plate for flattening for years. Sharpened and finished on the on the 4/8. He got the job done. Other alternatives have come down the pike since then. Lynn...