Yea thats a really good looking project. You should try painting one of the backstraps and let me know how it handled in the oven

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I'm really interested in this, so some pictures in different lighting environments would be great! I know exactly what you mean about the color of FDE looking different in pictures, thats why I had to ask.
I've been very interested in this lately. I've considered adding it to my list of services (after trying and perfecting the procedure on my personal guns of course). I was thinking trying something like FN does on the SCAR - a "two tone" FDE. Maybe use a "Magpul FDE" on the frame and more of a coyote brown on the slide - or vise versa. Hell, you could probably then throw the gun in a field in Afghanistan and lose it!
I'm almost positive slides can be shipped without any regulation - its only the frame that has restrictions. Painting the slide would still offer a FDE/Black option to people while locals and those who want to pay the special shipping could have the full gun painted.
Any chance you live in Michigan? I know its a long shot, but I'd trade you a holster to paint up my gun and maybe talk about subcontracting any paint work to you. Again, its a long shot, but I have to ask...
Steve