Todd, I used a wood burning tool I got at the hobby shop. I drilled holes in the tips that come with the tool to accept 1/16 and 3/32 brass tubing. Sharpen the end of the tubing and it makes an indentation like a rivet. You have to have some way to regulate the temp of the wood borning tool , so I used a light dimmer wired into an extension cord. For the panel lines, I just used a standard #2 pencil. Mike