As many of you know, plastics used in our beloved computers from the 70's, 80's and 90's contained a fire retardant called
Bromine. This chemical (along with exposure to the Sun's ultraviolet rays) cause a yellowing effect in the plastics. Sometimes orange, sometimes brown. Point is, their color changes at a chemical level.
Recent years have revealed that you can reverse this process with a solution (mostly hydrogen peroxide) and MORE exposure to ultraviolet light. This process has been termed "Retro-Brighting".
I have done this many times myself with various degrees of success. However, I have read many times that the whole process is only temporary and that, over time, the yellowing will always continue to happen.
So, has anyone experienced this first hand? I think Retro-Brighting has been around for a long time now so there should be some evidence if it's somewhat permanent or temporary.