Found a neat way to make your black carbon shafts look like wood. not perfect, but looks pretty good.
Spray brown paint on shaft, and while wet, wipe with paper towel lightly.
I found it easiest to spray down the length on one side, and wipe. Then rotate shaft 1/4 turn and repeat.
Don't know what kinds of paint will last, but mine should hold up as good as anything. I used a special paint called ep-acrylic, from Integrity Coatings. Made for bath repair (what I do for a living). It's a catalyzed finish that is similar to epoxy.
But ordinary spray paint may work very well.
Dan