Plotter Cutter
I’ve read a lot of late on the forums of people touching up their playfields with an airbrush and paper masks cut from masking paper. It seems a relatively straight forward process and so did some more investigating.
In so doing I stumbled accross a Craft-Robo CC330-20 cutter plotter which would appear to do everything that would be required for playfield touch-ups and at a reasonable price. So I bought one.
The CraftRobo CC330-20 plotter cutter
This looks like it may do the trick for several of my touch-ups.