I am interested in hearing about the striping myself.
As far as the delicate plating job you mentioned...Instead of
masking a whole piece try a rhodium pencil. If you don't have one
(which I am assuming) I suggest you make one. The mfgr'd ones are made
pretty poorly. (They tend to corrode on the inside connections)
I have one made with all platinum to hold the felt tip and inserted
that into a bic pen casing. You could probably use gold material to
make the electrical connection and save the money of using platinum.
Anyhow, a rhodium pencil can be used with your existing rectifier.
You don't need the plating rectifier that comes with the pens. Neg-to
piece. Pos-to pen. Just dip the tip into your rhodium and then
draw. Play with the voltage to see what gives you the best results.
Hope that helps,