Electro Pounce Alternative ideas
An "Electro Pounce" machine is basically a high voltage power supply with an electrode suited to drawing an arc through the pattern paper to a metal background while managing not to kill yourself.

THESE MACHINES CAN KILL

You NEVER want to be connected to the high voltage side.
 Never. 

There is a lot about DIY versions on the web - and some stories that tell you what can go wrong.

Many links via images here

And text links here

Some possibly useful comment here

A cautionary and somewhat amusing tale here. A more sensible approach may work.

Also web search on - DIY arc etch pen

A "real" one at work  - agh wow - lethal