Message #18866

[ajlaird]

It might be worth investigating these links:-

http://retr0bright.wikispaces.com/

http://www.using-hydrogen-peroxide.com/free-cleaning-tips-yellowed-plastic.html

If the plastic is of similar composition and the yellowing is caused by a similar process, then this might assist.

As always, test something inconsequential, or in an inconspicuous area first.

If you do try either of these, please let us know the results as there will be a lot of interest if you find either of these successful.