Sorry, I misunderstood the post.
You can mask off the parts you don't want painted, lightly sand the "black" parts and re-spray with any good spray paint. I use Dupli-color paint available at Advance Auto Parts.
Make sure it's pretty warm when you apply the paint (over 60 degrees) and apply in several THIN layers rather than one thick layer.
Thin layers prevent fish-eye, orange-peel and runs.
You might want to try Dupli-color
"Trim Black". It's a satin finish rather than high gloss. Looks more like original.
If they were originally gloss black, use Duplicolor Gloss black.