Not if you use a good quality, pH neutral, car wash shampoo. All Meguiar’s shampoos will safely remove traffic film and contaminants without damaging the protective wax coating*. Harsher detergents will strip polish and wax from the paint and significantly reduce the life of the wax protection. Search the MeguiarsUK YouTube channel for video demonstrations.
*Wash Plus+ is not pH neutral and is designed as a deep scrub.