Paul Burridge wrote:
Cecil Moore wrote:
One method of "etching" that worked for me was using a reamer
bit on a drill press to cut through the copper and barely into
the PCB material. This has the advantage of leaving a ground
plane in between the active traces. Also great for scouring
and sizing PCBs.

This is where those Dremmel tools come into their own!

As a matter of fact, when I did this stuff at home, I used a
Dremmel tool.