Fantastic research and results! I typically avoid yellowed hardware I see on eBay (it often goes for less as well). Maybe now I can save some money de-yellowing it myself.Until now, I thought the the only solutions were to mechanically remove the top layer of plastic (i.e. SoftScrub abrasive cleaner) or painting over it with paint that's a "close enough" match. Good to know there's a better solution.

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You really have to try it to see how effective it is. My mouse was my first test and it had yellow spots and unven yellowing. It was a mess. I went out at the end of the day to retreive it from the solution and could not believe the result. I tried my HD20 case then next day - it was really badly yellowed - also unevenly. Six hours later - and I have a uniform beige case - looks brand new.

What interests me is how the process does not leave you with a uniform "lightening" effect, with all the uneven markings still there - rather, it seems to remove JUST the yellow and leave behind the original beige surface. If you read the wiki it explains the chemical process that allows the selective removal of the yellowing.

Very rewarding.