I just saw a new Mini at the gas station in front of my office (the dealer is nearby)...the entire car is wrapped in translucent plastic, with what looks like masking tape along the A pillars and so on. Only the windshield and the driver window had been uncovered. First time I've seen that. So, your new Mini would really have new, clean paint. All you'd have to do is prevent the dealer washing it or wiping it with a dry cloth.