I've never seen or heard of someone using nightshades, but I believe its duplicolor that has a "black chrome" kit specifically for this. My local auto stores always carry it. I've always liked that look, I just don't trust myself enough to not mess it up.
the VHT is meant for a plastic painting surface. I'm not sure how well it would work on the wheel, or if it would even hold up without flaking.
If you want a black chrome look, I would go with the Dupli-Color Shadow Chrome kit: https://www.google.com/#q=duplicolor+shadow+chrome