Homebrew PCBs

"Andrew" <andrewm1973@...> writes:
> I have not yet.  I am scared that the little ~6 thou
> tracks will get scratched.

Pulsar does recommend the TRF layer to protect the toner if you're
going to use a sponge.  It's a thin film that sticks to the toner to
seal it and add some physical protection as well.  Perhaps a test
board would be useful?  I've got one here I use for such things:

        http://www.delorie.com/pcb/

scroll down to "Goodies" and download the bloat test board (pcb, pdf,
gerber).  It's got various traces and spacing, plus various annulus
sizes, from 12 mils down to 1.