/diy/ - Do It Yourself

>>2506176
Oh here's someone making such a stencil, though by the sounds of the article they're using it to expose a photoresist.
https://hackaday.com/2022/07/26/a-new-way-to-produce-pcbs-with-your-3d-printer/

There's also methods that add a permanent marker to a 3D printer to draw over locations that need to be protected from etching, and methods that cover the entire board with permanent marker ink and simply scratch away the unwanted ink. I've had mixed results using permanent ink as an etch resist though, seems to not last slow etches.

For the laser stuff, Marco Reps has touched on using lasers to do PCBs a few times before, though he tends to use fancy fibre-lasers with incredibly fine focal points, which results in an incredibly fine PCB pitch. Much finer than my shitty diode laser.