Has anyone used Press-n-Peel?
Rather than using UV it's a process where you can print directly onto the Press-n-Peel with a laser printer or photocopier, apply to a piece of brass, use an iron to fix it and then remove the carrier film, leaving everything but the parts that were printed (the toner prevents the press-n-peel sticking to the brass.
It sounds quite effective and possibly may be a little tougher and stand up to etchant better too?
Here's a link for the site:
http://www.cibs.co.uk/etch/x7.html