[Coco] Possible remedy for old yellow
kevdig at hypersurf.com
Mon May 3 12:21:27 EDT 2004
Would Armour All help?
> --- Robert Gault <robert.gault at worldnet.att.net> wrote:
> > Bob wrote:
> > Speaking as a chemist and knowing something about plastics, the
> > yellowing is usually caused by the oxidation of the UV and anti-oxidant
> > inhibitors in the top layer of the plastic exposed to air and light. If
> > the whitener is a bleach (ie. oxidizer), it usually make things worse.
> > If the yellowing was caused by deposition of dirt on the plastic, then a
> > bleach or even a mild abrasive would clean things up.
> > Your tooth paste uses peroxides as a whitening agent. They could just
> > accelerate whatever damage caused yellowing in the first place.
> > Since I don't know what happened to your cases, they may indeed clean
> > up. Prudence would caution testing on small non visible portions of the
> > case.
> Thanks for the info Robert... somehow I missed this post before. I'm not sure
> what happened to these cases either, they were all given to me pretty badly
> yellowed. I'll try some tests and let you all know. I think ultimately I may
> just recommend spray paint. ;-) (I've thought about a black & silver CoCo3)
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