This is idea vomit more for me to come back and reread. I think I found a super easy cheat to get what I want and not have to make a 3D stamp or pad print and tinker with which kinds of liquid masks would work and give me consistent results...I am lifting strategy from the people who make their own circuit boards here but excluding the step of etching the design onto copper. I can essentially create a mask via toner from a laser jet and iron it onto the dial which should create a pretty accurate mask in the brass, this is essentially a temporary tattoo. I would then electroplate and do the chemical reaction, then remove the toner and should be left with a negative relief galvanic dial! After spending waaaay to much time researching I found someone
who did something very similar albeit a brass plate then plated in zinc so the concept should work great.
Inching forward to reality.