If not a brush, was it a Japanese comb, as the official Essence press launch kit suggests?
The car came equipped with bespoke Louise Vuitton luggage to announce the affiliation between Infiniti and the premium French baggage brand, if this helps? So, was the car displayed in an American branch of Louise Vuitton? Infiniti is now also selling a limited run of minature Essence sculptures at $300 each, available with a special VL presentation case for extra cash.
Although Infiniti says it never looks to other car designs to set its own style, the Aston Martin DB9 is the closest inspiration.