pearl looks ok one my xf`s had while back was white with the blue pearl in the clear think was 250ml pearl with 2lt in the clear coat was a good mix.
wouldnt call it dirty some light angles makes the panels look different colours or missmatched, sort of pain respraying panels but not much different to metalics as long as the painter remembers the white base colour and the clear/pearl mix.
wouldnt go red pearl with white may turn out pink theres to many pink e series being spotted on the streets

*waits for gavs reply*