One of the things that's bothered me for a while is the yellowing of the keyboard letters. Today I took a chance on using UV light and a hydrogen peroxide bleach. I'm pleased to report that it works perfectly. Album here:
https://www.dropbox.com/sc/fycxe6irkcx0lpb/AABFJP6k1EdLMgdfigDYr7AhaEssentially you cover the lettering in the hair dye. Then put under UV light (I used my wife's nail dryer) for 1 hour. Pull them out and rinse. It was really hard to capture in photos because of the auto color correction on my phone camera, but it makes a huge difference in person.
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Brian
nice trick.. I should try that with an old mouse (not related to Next)
You can find more information here:
http://retr0bright.wikispaces.com/I was unsure how this would behave on the black plastics, but there was no discoloration. Only the text was bleached back to white. The keys look brand new now.
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Brian