You picked a difficult metal to play with.
Hard to drill / cut etc.
I hate the stuff with a passion, yes.
That is why i started with the etching, it was the only method i could think of that works with stainless without beeing a royal pain in the neck.
Edit: One of the things i learned about it, many people said:
"You can not electroplate stainless with copper, it simply does not work."
I have succesfully and permanently plated stainless 3 times now with extremely good adhesion and twice with not that good results.
There will have to be a lot of tinkering ahead of me
Have you tried toner transfer, rather than stencils?
I tried toner transfer many years ago, for PCB etching, and never could get it to work reliably. I do not want to try it again.
I have seen people use toner transfer to electro etch aluminum, tin and copper.
The results look nice but not up to my standards when it comes to surface/edge finish.
For you chemical guys - is there an electrolyte that will etch and colour aluminium?
I am fairly certain that it works the same way for steel then aluminum and there you have to differentiate.
You etch (depth) with DC and mark (color) with AC current, the electrolyte removes the metal of the workpiece and then deposits it back onto the surface.
You either get a deep etching (DC) or a marked etching (AC), if you want to have a marked and deep etching you need to first etch with DC and then mark it with AC.
For that i have plans to use a motor driver h bridge (maybe it will not work) instead of an transformer to "automate" the whole process with precise frequency, current and voltage control.
I got a hunk of graphite to use as an electrode for the marking and etching of bigger pieces that do not fit in the tank.
For stainless i can answer your question i think, i only got the recipie for now:
Citric Acid, sodium nitrate, Sodium metabisulfite and Acetone.
At least that will be my starting point.
Edit: To be honest... my first try marking will be just with citrus juice and acetone
Greetings,
Peter