A guy at the salvage yard I go to has a Ranger with these wheels painted a dark charcoal. He painted the whole wheel. I think they look good in charcoal, but wouldn't like them all black.
I've been thinking about doing something like what you have in mind Jim on my '01 with those same wheels that you have. My wheels are great candidates for painting because the finish is deteriorating, but I can't decide what I want. I think I want a softer look than gloss black - maybe a satin black or charcoal. But I haven't figured out the pattern I want.