[Coco] Retrobright - anyone used it on a coco 2/3?

Michael Graham jmetal88 at sbcglobal.net
Mon Aug 30 15:30:40 EDT 2010

  On 8/30/2010 2:14 PM, RJRTTY at aol.com wrote:
> In a message dated 8/30/2010 11:36:19 A.M. Eastern Daylight Time,
> badfrog at gmail.com writes:
>> This is different than just the yellowing due to dirt.  After 20  years
>> or so the yellowing of the plastic is a chemical reaction, which  is
>> accelerated if exposed to UV.  No amount of detergent is going  to
>> bring it back to normal.
>> I think the retrobright website  actually has a description of why it
> happens.
> It is called polymeration.   The long molecules of the plastic  start to
> develop interconnections between each other and the plastic  yellows
> and can even become brittle if it is severe.   If that is what  has happened
> the best thing would be to get a can of white "Fusion" paint and  apply
> that to the enclosure.
> Roy
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The retr0brite solution - hydrogen peroxide and oxygen detergent - 
actually reverses the polymeration when applied in conjunction with more 
UV exposure.  I would tend to argue that the best thing would be to use 
the retr0brite process followed by a flat or satin clear coat.

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