Question about painting over a scan

[Delfin93]

(01-30-2018, 10:06 PM)Ofnuts Wrote: Add a transparent layer above the scan layer and paint on that layer. For checks, add a white layer between these two layers and toggle its visibility ("off" to paint, "on" to check and to produce final image).

Thanks a lot, this worked out for me!
Here the result:

(01-31-2018, 09:03 AM)rich2005 Wrote: @Delfin93

You could try the gmic plugin http://www.gmic.eu One of the filters is repair-scanned-documents

Had some trouble installing the Plugin, then it worked out with the help of some turtorials. Awesome filters but sadly the result was not clear enough when I used the "repaired documents filter". One could still see the pencil. But I'm sure it's a usefull tool for other kind of works!