I have made touchmarks for a few of my blacksmith friends, and do the work on my Gorton 3-U engraver; for the original pattern, I use 1/8" engraving plastic stock, cut out the characters with the bandsaw, smooth them and glue them onto another piece of engraving stock with Duco cement, and make it to a scale that will use perhaps a 10:1 reduction ; a 5" figure gives a 1/2" stamp, or smaller if a greater reduction is used.