Because of the damage to the spine folds I will have to do repairs. I have used a Japanese , long fibre paper (Toned Kozo) To save time I have fold the repair paper over on its self a number of times and staple the folded paper to a piece of board. I then pre-cut the lot with a perforation wheel, the strips can be removed as and when required.
The cuts have a slight undulation. I find this method to be quick and saves on repair paper.
I am sure that purists will be up in arms at this method but it works. The adhesive I use is a Japanese rice starch paste.