I'm moving to a high-rise condo and can't wash my car in the parking garage (supposedly). Which leads to my story / question.... When I use QEW, I don't like just drying it. So I go to a coin wash, and go over the entire car, then put my money in and use the rinse only and dry the car there. Could I use this same method with regular car wash (like mother's california gold, or meguiar's nxt)? Reason I ask, is that I can get the NXT car wash super cheap. QEW is also hard to get in my area. I have to get it from an RV shop that is like 2 hours away. So I was thinking about this. I know I can do it if I rinse the car, then soap it with the NXT, then put more money in and rinse it. But I don't know the chemistry difference between NXT and QEW for the washing without pre-rinsing part.