Re: Plotters for application of Etch resist

A little bit maybe off subject for this list but will try it anyway...
A number of people have over the years been experimenting by replacing
plotter pens with other pens (steadler lumocolor in particular), etch resist
pens, or simply putting etch ink into plotter pen bodies all in order to
apply artwork direct to metal substrates loaded onto plotter tables.
I have found an Australian fellow who is still doing it with a custom made
plotter he fabricated using hardware from other plotters.
My questions...has anyone on the list any recent experience of this activity
and what pens/inks/plotters etc they are using successfully.
What metals have they successfully worked on.
What etchants did they employ.
thanks
Raynor Johnston (NZ)