Brad, I have been working on watch parts pens, also on Zeta tubes, for some time and I've almost got it sussed. My biggest problem is bending the dials without cracking the paint. I tried a coat of acrylic lacquer before bending, but no change. Would you be willing to offer me some advice?
Sure, don't try it with dials that are enamel coated ... they crack. If I get any they usually go in the crap box, got quite a few now, perhaps one day I'll find a use for them but I haven't yet
Brad