Any ideas Please.

My first thought would be to try black royal icing lightly sponged on. Not sure if it would work, but that would be my first attempt.

A paint gun with dark cocoa. Have no clue how to do that, but when the chocolate artists spray their chocolate with cocoa powder, that's what it looks like...velvet.

"...Hold the sprayer far enough away from whatever it is that you are spraying so that you get a nice and velvety effect" Exactly! From here: http://www.cheftalk.com/t/4188/chocolate-spray-gun

Maybe just dust it with black petal dust/non-toxic chalk? then don't steam to set the colors?

You can buy chocolate velvet spray in a can...

http://www.pastrychef.com/CHOCOLATE-VELVET-SPRAY_p_711.html

Well look at that..in a can! Awesome!

Thanks, Everyone, For your replys

Hi, just use black petal dust or dusting powder that has no shimmer in it!