Ancient book repair techniques

Bamberg, Staatsbibliothek, Msc.Patr.41, fol. 69r. Detail.

Have you seen the medieval book repair posts over at Colossal?  There are also some pretty great doodles and marginalia from days of old.   They were pretty creative working around holes and worn spots, even including what looks like crochet and embroidery.  I'm not sure how useful those repair techniques would work in the modern world in a public library setting.  What would the patrons think?