I have used ImageON and Puretch, but have switched to using PNP
(Press and Peel), as my resist for photo etched pieces.
In the spirit if the Tips thread and this one combined–
I have found that if I pre-etch my silver for about a minute in
nitric acid before applying my image (by whatever means), the
resist holds on and resists the acid much more effectively. Just be
sure to rinse well, dry well, don’t touch the surface.