When I lift the silver out of the bath to check its progress the
PNP paper falls off part of the silver
When etching silver, regardless of the form of resist, the resist
will hold on better if you pre-etch your silver for 1 minute (in
nitric acid) before you apply resist to it. Rinse it very
thoroughly, of course, dry it without touching the surface with your
You can touch up resist (that didn’t come out right, or that lifts)
with paint marker, an clean, dry silver. It is not very easy to
control, especially for fine lines, but excess can be scraped away
with a steel tool when dry.
In fact, you can draw directly on metal with a paint marker and
etch. It will stay on much better, though, if you pre-etch.