3d printers have too low resolution for this, maybe 0.1 head would manage some crude plates, but much easier idea - mount a dulled needle and drag it over plast

3d printers have too low resolution for this, maybe 0.1 head would manage some crude plates, but much easier idea - mount a dulled needle and drag it over plastic plate in required shapes. That should work better, but watch out for needle skipping over surface.