Does anybody have an old, really yellowed keyboard I could buy from you? Some super-cheapo model is best and it can be non-functional. I have some retrobriting ideas and want to source a bunch of keycaps with similar levels of yellowing to experiment.
The yellower the better! I want to experiment with a couple of different variables and see which ways are the best. The keyboard doesn't have to be so yellow it is brown, but the more yellow it is the easier it is to that "method X "whitened the keycap L%, "method Y" whitened the keycap M%, and "method Z" whitened N% so method ___ is the best. (That should work as long as the items were equivalent to start with, which is why keycaps are useful for this--you have a bunch of separable objects you can use for experimentation that started out in about the same condition.)
It is nicely (for my purposes) yellowed. Unfortunately some of the keys are inexplicably less yellow than others, but if you've got a keyboard similar to this, yes, I'd love to have it. (Note that the keyboard looks more yellow in the picture than in person). If not, I think this will work for my purposes if I select specific keys with similar yellowing. Thank you all for your replies and offers!