Interesting idea, wonder if it really works?
Will try as soon I get my machine working again.
Interesting. Dry erase markers contain a resin, pigment and alcohol solvents. The resin and pigment are apparently getting baked onto the surface. This is using a 1000 mw UV diode laser and I kind of doubt it will work with our CO2 lasers, probably just get blasted off, but will be interesting to try. Probably using lowest power with a defocused beam. https://sciencing.com/list-6040398-chemicals-dry-erase-markers.html