As a general rule, leather that has suffered damage can be successfully repaired. In the case of bicast this is problematic as any repair can only be as strong as the surrounding material. With bicast, the material is inherently weak. As such, a repair to bicast will, in all likelihood, fail.
At the end of this blog entry you'll find a link to photos that have been sent to me by consumers depicting their classic problems with bicast material. They show the wide variety of ways bicast fails. In the world of furniture there has never been a more true application of the phrase "buyer beware." Bicast is a problem waiting to happen.
Here is the text of an excellent article written by Barbara Carney, a leather restoration expert in the Chicago area.