I am looking for an advice on how to restore a set of six leather chairs. They were made in Vienna more than 100 years ago. I think it is a pigskin stretched over a wood frame and nailed on the outside of the chair frame with the decorative pins. I have posted some pictures at
You can see that the leather is cracking, and seems to be deteriorating faster and faster, especially the seats. Please advise: Can it be fixed, and how?