Hi

I would like to be able to punch some straight lines onto silver so that I can use platinol and then polish back so just the grooves are dark (think aztec/tribal kind of designs). I'm having problems making the grooves though! I thought I would be able to buy a steel punch with just a line on, but after scouring the internet I can't find one anywhere. I've tried using a screwdriver but this just made a mess, and then I thought a mini steel chisel would do the trick, but the line on that is too fine so that it looks like a scratch rather than a deliberate design. Does anyone know where I can get a punch from or has an idea of a substitute, or just a much better method for what I'm after?

Thanks