Hmm, I have 2 keyboards that I use regularly. One black old IBM and one white modern wireless Logitech keyboard. I use the black keyboard when I'm messing around with BIOS or the batteries of my white keyboard run dry, I'm also using it with my old backup laptop which I'm currently using. Similarly I also have a wireless white mouse(as part of the set with my white keyboard) and a backup old black microsoft mouse. Both keyboard use the Danish standard, but I'm not in Denmark nor am I Danish. technically and in all practical manner the keyboard are fine, but most people are negligent to touch 'em. There are small scratches on both keyboard, but I don't know their origin.
The black keyboard is covered with all sort of dirt and grease. If I turn it upside down it produces a miniature nuclear winter snowfall. It's Win buttons are removed from between the Alt(s) and Ctrl(s). All the keys are dirty from the sides, but the following are NOT dirty on the top: arrow keys, spacebar, left-shift, left-Alt, Home, End, A, S, D, W, X, NumPad Minus and NumPad Plus. Funnily you can't see the uncleanness if you don't look at the keyboard at a sharp corner, but If you scrape the keys with you nails you uncover a brighter level of dirt leaving it at contrast with the black keyboard. None of the keys are faded. It makes a nice *click* when a key is pressed.
The white keyboard is cleaner, but still produces a miniature nuclear winter snowfall. No keys are missing or faded. Only keys that are fully clean are the nonstandard functions(like My Home, Search, Volume + and -, I honestly don't even know what most of them do and I usually install them for my OS) at the top. The following are NOT dirty on the top: arrow keys, left-Ctrl, left-shift, left-Alt, A, S, D, W, C, G, 2, F2, F3, Right-Ctrl, <, NumPad 5 , NumPad 1 , NumPad 4 , NumPad 6 , NumPad 9 , NumPad 8 and NumPad Plus. Dirt is more visible on this keyboard.
I'd like to see how you solve THIS.