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I use the same technique for embossing leather. I do soak the leather some before hand to soften it up, and this aids in the results lasting longer. I use a metal necklace charm of a tree (I modified a little) as my makers mark, the possibilities are nearly endless.I agree with Orngrimm, use a nice solid backer and spreader plate or board to provide even pressure and prevent unwanted marks. Great 'Ible!