I recently received a Franz Swaty that in bought in eBay fir $10. It has some cracks along the borders. Otherwise, the stone looks good.

First question: Should i lap the whole stone until the cracks are gone or should i bevel the borders?

Second: What should I use to lap and/or bevel?

Third: If I lap the stone with 400 grit on one side, and 1500 grit on the other, will there be a difference in performance from side to side?


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