You write:

> Let's try this again, apologies if anyone receives it twice.

So far I've only received it once...

> In my opinion the only etchant acceptable for hobbyist work is CuCl.
> 
> Lots of links and good information can be had on the homebrew PCB group:
> 
> http://groups.yahoo.com/group/Homebrew_PCBs/

Thank you *so* much for posting this!  I haven't etched a PCB in 20
years, but I just might be etching a bunch in the next few weeks --
all 1-offs or I'd simply be using one of the low-volume commercial
shops.

The only masking system I know of is the resist-ink pen.  Can you
provide the low-down on the best way for the hobbyist to mask a board
these days?  I already own both inkjet and laser printers...

-p.
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