More fascinating than the fact it works, is why it works. Great reading on that site.
This will probably work on more than just computer parts & cases. Probably on any white/gray plastics from that era that have discolored and become yellow/brown.
I'll have to wait till summer and look around for some yellowed plastic to try it out on and see.
Now if only someone could figure out how to reverse the brittling of plastic that has been exposed to too much UV light (like the externally facing plastic grill cover on a window fan)