Isn’t that similar to how tattoos are removed?
Way back in the 60s a high school friend of mine had built a 3 inch ruby rod laser housed in a lunchbox thermos and powered by an army 100 pound suitcase full of capacitors. He showed me how it could neatly remove one printed letter from a sheet of typing. He said those things would eventually disable ICBMs.
Yes I believe so. so it would work on other inks, not just toner inks.