I have a sheet metal and want to cut a complicated pattern (letters) in the field for a sign. I was thinking of 3d printing a router guide, but are there router bits for steel?! Does such a thing exist? I don't have a CNC machine. I am thinking the hardway is to trace the letters on to it and cut them out with a Dremel but that will take forever. I'm adding text because I have to meet 400 characters I guess. #industry