if it is specifically about pictures then wouldn't an analog copy clean it up? What about adding new spymark on top of it?
If it is text, copying text alone and not the file will it not remove it? Massage the text with Ai and vola spymark gone, don't you think?
> copying text alone and not the file will it not remove it
No. The mark is hidden in the word choices.
See the demo in the article.