Un-Yellowing yellowed plastic

[Barry Watzman]

Ok, someone else put me onto this.

We all know how white/beige ABS plastic can turn yellow after years;
especially if it's exposed to UV (e.g. fluorescent) light.

Many generally thought that the only solution was to spray paint over
the plastic in the original color.

Well, there is another solution, called "Retr0brite".

See:

http://www.psfk.com/2009/03/retrobrite-open-source-problem-solving.html

http://retr0bright.wikispaces.com/

And, in particular, to make the stuff (it is not commercially available):

http://retr0bright.wikispaces.com/Retr0Bright+Gel

[John Crane]

Barry, my Osborne loves you.

Now I wonder if I can do that with the number keys on an old HP-65.....

-John