I've been reading that NXT wax has mild cleaners in it. Consequently, how does it work over a pure polish like #7 (or #81)? A Meg phone tech recommended using #7 prior to NXT, and I like the idea of the wetness that #7 will add. But if NXT has cleaners, won't it diminish the effect of #7?
What about #21? Does it have cleaners too?