There are so many options in Black these days it can be tough to make a choice.  In this case our customer didn't have to choose.  He actually gave us quite a bit of creative liberty with this one and just let us run with an idea that we had.  It ended up coming out spectacular.  We used APA's Ultra Matte Black and Oracal's Black Galactic Gold.  We have used both of these colors in the past on different vehicles so we could see the vision clearly enough that we were incredibly confident in the end result.  It's a shame you can't see the iridescent flake on the gloss side, but the sun was not cooperating with us that day.