De-yellowing

[Ali]

> I recently restored several VT100 that were extremely yellowed as well
> as filthy dirty.
> 
> I put the plastics in my bathtub and sprayed them heavily with "Krud
> Kutter", intending only to remove the dirt.  To my surprise, much of
> the yellowing came off too.   It didn't return them to their pristine
> original color but significantly reduced the yellowing as a tea colored
> runoff pooled in the bottom of the tub.

Chris,

Do you have pictures? I wonder if one of the main ingredients maybe H2O2.
Also how long ago did you do this? There may not have been enough time for a
return to the yellow color.

-Ali