What I see in that pict. is a very neglected wheel where the finish appears to be peeling. It doesn't look like pitting to me. Any alloy wheel needs TLC, and with the abrasive brake dust put out by the Brembos, the wheels need to be kept clean and should be waxed regularly. However, peeling is not normal. Take it to the dealer. I'd advise you to clean them up first, as the dealer could blame you for the condition.
Lou
Lou