- This page goes over pen/marker selection for PCB Plotting use cases
Pens for etching circuit boards.
- Staedtler Lumocolor Permanent Marker - 
- Dalo 33 Industrial Marker - https://www.amazon.com/dp/B00JLG93L6/ref=dp_cerb_1
- Nail polish
Use a scribe in reverse -
- PCB Plotting
- Precision Marker
- Open Source Marker - need to make this 3dp body + cap + nib cloth/sponge, flexible filamnet with microchannel and some diffuser like a fountain pen-marker hybrid?
- Open Source Ink