also, what would it look like if you injected multple colors into a single mold? (letting it mix on it's own? not sure how the equipment works...) would it be like some multi-colored vinyl LPs or would it be just a even blend of the colors?
if it would have some neat effect, this would be a way to make the injection parts unique (each one slightly different) but still keep the cost low.
.... and i've been looking for a set of "interesting" blank keycaps (kinda like what artisans do for some of the blanks they produce, usually either a mix of a couple colors in a single keycap or a single unique color or effect... transparent, glitter, pearl, etc....)