Chuck Guzis wrote:
  If this is made of lthe usual ABS or acrylic plastics,
it's going to get
 weak and brittle with age.  On the other hand, if you're dealing with
 high-density structural foam, you're somewhat better off, as the stuff is
 pretty stable, but harder to repair. 
Any idea what IBM used in the IBM PS/2 Model 80, and many of the older
RS/6000's?  It's some kind of plastic, but not ABS.  It's quite fibrous
looking on the inside.  It seems to be very strong.
Chad Fernandez
Michigan, USA