Gyeon Quartz Q2M Foam | Car Pre-WashGyeon Q2M Foam is an extremely effective pre wash when combined with an appropriate foam cannon. Pre washing, especially on cars where a paint correction has been made, is very important to preserve the best possible visual effect for longer. QM Foam ensures a highly effective first step in the cleansing process, as it helps to decrease the amount of dirt that needs to be removed during the proper, major wash with a mitt and shampoo. Pre dilute QM