I've never seen a powdercoat or paint system that really mimics CAD plating. CAD plating, as people generally refer to it, is usually CAD with brightener and a gold conversion coat. CAD plating can actually take on several looks depending on the use of brighteners or not, and the color of the conversion coat used (clear, clear blue, yellow, olive drap, . . . ).
The chemicals you need to mimic any of these finishes can be found at Caswell Plating using the "Copy CAD' system. Since the EPA would frown on doing CAD plating from your home the system uses zinc as an alternative. I find that 99.9% of people cant tell the difference between brightened zinc with a yellow conversion coat and bright CAD with a yellow conversion coat, and that only 1 woman I work with (now retired) could do so with any reliability. It does take a small investment, research and a little trial and error, but the results can be outstanding.
I've attached a picture to give you an idea what type of results can be achieved and could answer questions if you need help. you can check out my Flickr page that shows the basic setup in a couple pictures, but has since expanded slightly.
Also, most industries have converted from bright gold CAD to bright gold zinc (except for aviation) and people don't see the difference. Zinc corrosion protection is only slightly lower than CAD with the real protection coming from the conversion coat on the surface.
Once setup you'll be set for a lifetime of restorations and continual touch-ups as pieces need to be refinished.
http://www.flickr.com/photos/65829813@N02/