Over at
Atariage.com is a discussion about reversing the yellowing of
plastic. The procedure was designed by chemical and plastics engineers.
It works and doesn't weaken the plastic. See
http://www.atariage.com/forums/index.php?showtopic=138244&hl= and
http://eab.abime.net/showthread.php?t=37808 for the original source.
--
David Griffith
dgriffi at
cs.csubak.edu