The handbrake metal part is a smooth satin black, not textured.
I too had a steering column cover with abrasion marks form the keys. I wanted to keep the splatter effect as original as possible, so i made some trials.
I've successfully reproduced the splatter effect with some hand placed dabs of filler where the abrasions were, letting them dry, stacking a few layers, and finally covering the whole steering column cover in a fresh thin matt satin black. The original splatter effect paint is dull, but your fresh black layer will be a smooth layer; even a matt paint it too shiny. Wiping that before it dries will give it the original matt finish, but now with all scratches filled and everything looking uniform.
This leaves the original splatter effect in place. Here's the endresult; you can't even make out where the paint was chipped.
by the way, the rings around the instruments, the steering column panel and the center console all have different textures