Never thought about painting the inside rims black, but am very concerned with the dirty and rusted look on that part of the car.
The rear rim on my 05 C6 is big enough to get your hand in with a scotch brite pad and get rid of all the dust, but the front you get squeezed by the brake caliper. To move the car or jack it to rotate and clean them all the time is like, well, yeah, right, but ill do it for a show or something.
I can continuue to beat up my hands washing the inside rims, however I cant take the rust, and discoloration of the suspension parts.
I have purchased some ceramic caliper paint and after wire brushing the ends, insides, and every hole in my rotors, Im going to paint them. That will at least get rid of that ugly rust, just cheapens the whole car.
As for the suspension parts, dunno about black, not when their cast in natural aluminum. So Im thinkin goin the wire brush route, (I use one on a drill, a very cheap one with fine bristles that almost polish, not gouge) and then hittin all the peices with a clear coat.