Thanks for all the inputs; they will be investigated!
Fred’s avisynth script: yes, I’m using (also) this to clean scenes, and it works well in the vast majority of the cases; probably a professional software (and a more skilled editor) could do better; so, if there are some available restored deleted scenes/shots that could be used for this project, please PM me with links.
Just discovered that Deleted Magic Revisited has a nice preview crawl, never seen before (by me, of course…); another great find!