Game Boy Advance - Custom Buttons - Silver
My buttons are hand-cast in my own molds, and feature a fully-functioning d-pad - unlike the ones from China and other retailers which do not hit the diagonals well and feel odd.
First a clear resin is poured and allowed to cure, then a mica powder is put in and back filled in a coloured resin - it is done like this so that the metallic effect will not wear off as it is encapsulated beneath the clear resin. Mica powder may be patchy on the part of the button not seen, this is the nature of the process. These are suited towards solid shell builds.