Sorry I haven't done this yet. The main trick is to file slowly by hand through the lamination to get to the harder metal. I filed mine on the spine and found that rounding it off helps also, atleast with the specific striking technique he had me use. You have to file slowly by hand though because its easy to overheat a laminated Mora and permanantly mess it up. I will have to go through my emails and compile them in to one tutorial because he went in to lots of detail on striking technique as it is slightly different from that which is used with normal strikers (if I am remembering correctly). I was also amazed at the big difference in RC/hardness between the lamination and the "core" metal on the Moras. The core metal was a lot harder than the lamination and also harder than any knife I own (RC63 maybe.. I'll have to review my emails).