Has anyone here ever tried using a synthetic QD (M135 or UQD) over #26 or GCC+? Does it take away from the carnauba depth and shine. I have a black Challenger for my summer driver, and have used UW and NXT on it before. I'm thinking of trying either GCC+ or #26 on it, the only problem is I just went out and bought a gallon each of D156 and M135 and don't want to "obsolete" them if I do like the shine, especially since if I need to buy the GCQD to go with it. I do have 2 other vehicles I could use it on, just won't consume it nearly as quickly as I would if I was using it on the toy car. I don't want to make "finance" unhappy with the previous purchase.

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