I've read that the car manufacturers want orange peel in the paint on new cars to hide some of the minor flaws and imperfections from the metal stamping process. The human eye can see imperfections which are measured in the thousandths of an inch on real glossy surfaces. (think of a tightly gapped spark plug) The orange peel hides these minor imperfections which eliminates the need for car manufacturers to block sand the cars prior to painting.