Vacuum foam plastic

I recently received a George Segal sculpture made from Vacuum Foam
Plastic. The plastic has yellowed considerably (it used to be
white), and has become quite brittle. A small loss and splinter
developed in one of the corners, very likely as a result of someone
knocking it accidentally.

The sculpture dates from 1976, and is one of his Gazing Woman
series.

Does anyone have any experience conserving this type of material?

Anita Henry
A.E. Henry enr.
Paintings Conservator

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                  Conservation DistList Instance 12:64
                Distributed: Thursday, February 4, 1999
                       Message Id: cdl-12-64-018
                                  ***