Hello, as far as I know AI it is only useful to resize files, and with small size files, there are watercolor effects. I didn't see that it can fix scratches or partial artworks broken parts with 100% efficiency. And I don't know if it can clean dirty or small dust particles that is the main problem to fix boxes. If you know any AI that can help this maybe it can improve the clean task. Usually some part are blured too, I don't know if AI can deal with it too.
Unfortunately until now, the best accuracy process is spent hours cleaning and fixing covers. Even retouch software can be broken the covers if you use filters in excess, that is the best way to clean points and dirty until now.
Regards and if you know more about cleaning process, any help is welcome.