I'm pretty sure the camo bows are being water dipped. I would think most of the new bows are powder coated.
I love Black Risers, in fact my last couple rigs have had 'em and i'm sure than many more of my bows in the future will have them. Last season I shot a Black riser/Camo limb Z7, this season I finally went for an ALL Black bow and picked up the Bowtech Invasion CPX Black Ops.