Strip the paint off Loose Rivet (will someone please rename the aircraft if only to stop me calling it this) and you'll be able to watch the airframe oxidise even faster than it has done so far.
There is of course some benefit in keeping the top white rather than some non-descript grey colour, this thing is full of rather warm electronics let alone the several kilowatts given off by the crew and without the white paint its likley to overheat in the sun of a Waddington winters day.