hubcap

I've got a pair of hub caps for sale. Missing a few bolts and snap rings. Thoes are that's $3-$5 @ any dealership. Selling them for $200 comes with Hines owner's manual.

I have a 2003 Solar Yellow Xterra with the sports package I'd like to know how to paint my hubcaps black and paint the step-up thing black? is there anyway to do those? and what would I have to get and do? sorry if there are already topic on this, I'm new and don't necessarily know how to work...