Awhile ago, I had the pleasure of having a two year old take a marker to my laptop while I was at the library. Even though there was a dozen witnesses, the mother refused to take any responsibility for the actions of her kid. (Have to love mothers like that.) It was a pretty picture of clouds and flowers but it really needed to go. Hairspray, the non-aerosol kind, was suggested but that just spread it around. Finally got rid of the ink with an alcohol pad. It took a couple of them but it’s all gone.
Image taken from here. I couldn’t find any of marker on a laptop. Kind of weird.