For customers wondering what the "Wrinkle" finish is. The best example I can give you is the engine/valve covers on either a:
Honda S2000 (valve cover)
Dodge Viper (Upper Intake Plenum)
Ferrari (most; Upper Intake Plenums)
It is a textured finish that adds a nice level of detail to any part coated. It is a semi-gloss finish available in four colors standard.
Again, a great way to further customize the engine bay of your 370z!!