by jediknight219 » Wed Sep 07, 2011 7:00 pm
The yellowing of the pieces is, as far as I know, due to ultraviolet light breaking down flame retardant chemicals which then oxidize. So as far as prevention, less sunlight is good. Soaking the pieces in hydrogen peroxide can decrease the yellowing. Somewhere I saw some people that were using peroxide and oxyclean to remove yellowing from old computer cases. That site had more information on what was going on chemically.