The Zurallic Blue was originally used on the first Aero SS
The 'metallic' is supposed to come from small flecks of glass/crystal; however, I don't think it is distinguishable from the finish BMW achieve with their Carbon Black Metallic (blue) and Ruby Black Metallic (red). The first car did look different (almost like small balls of lighter blue in the paint) but since then, it really does look like a standard metallic paint. It might be worth checking whether MMC are using the BMW paint codes.
