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Trace the blade profile on a piece of cardboard, cut out the shape and reverse the cardboard so the toe on the cardboard is on the heel of your razor, trace on to the blade with a Sharpie. That is...

You are going to have to remove a lot of material to get to a Spanish point. I would make it smile, with just a bit of work on the heel, on a DMT. Just transfer the point curve to the heel tracing it...