Punching Holes, Adding Jumpers, Flattening the Teeth of the Caps
This is the easy part. Just place a rubber sheet over the teeth of the cap, and beat gently with the hammer till the teeth have flattened out. Don't put too much pressure or you'll end up flattening the entire cap. Once you have put in your picture, quote, design, etc., hold it the right side up, and punch a hole at the top of the cap to put in the jumper.