Goodbye yellow brick!

I've been reading about de-yellowing old equipment. Quite a few of my older babies have significant discolouration issues. Until recently I followed with the received wisdom, that once a plastic item has yellowed there's no going back. Chemical changes within the plastic produce the effect, and no amount of scrubbing will ever return your creamy commodore, beigey beeb or tawny tandy to its former glory. So imagine my surprise when I stumbled upon this wonderful posting over at the vintage computer forums. 

Old computer enthusiasm and chemistry wizardry have come up with a recipe for undoing the supposedly permanent effects of UV and fire retardants!

I'm definitely going to try this out, as soon as I can get hold of the requisite chemicals...