[GreenKeys] GreenKeys Digest, Vol 82, Issue 27

[Sam Hallas]

Jeffrey Angus wrote:
>  On 11/30/2010 12:15 PM, John Nagle wrote:
> > Incidentally, it is possible to return yellowed plastic cases, as
> > on the Model 33, to their original white.  The yellowing is from
> > bromine migrating to the surface, and there are techniques
> > involving hydrogen peroxide and UV light to remove it.
>  Ooooh, I have a lot of Motorola and teleco equipment that has that
>  problem.

Do a search on Retr0brite (that's a zero in the middle)

I did some experiments and found that the oxy bleach was sufficient 
without the hydrogen peroxide.
http://www.samhallas.co.uk/collection/retr0bright.htm

Cheers,
Sam