My Up, Hilary, is candy white and I have become OCD about keeping her sparkling. I do an M27, M3, M25 200mile return trip every 2 weeks and the front gets covered in dead insects. Best thing to do is rinse them off asap. I later shampoo, rinse, leather and then dry off with the magic yellow cloth from the autoglym pack. This removes every last tiny black mark from the paintwork then just toss it in the washing machine (the cloth not the car) and it comes up like new.