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I have a friend that for years never used a wax on his black show car. Only glazes. His claim was that a wax detracted from the dazzling black look. This is the very car I speak of. Today, it is commonly a best of show winner.
It's a 1968 SS396 Chevelle. At this show, World of Wheels in Milwaukee, Feb 2018, it did take a best in show. One of many.
I can perhaps believe that in his instance, or because perhaps the waxes "he" was using were not that optically transparent, or for some other specific reason, that these waxes he used left a haze and clouded the paint to a certain degree.
Of course this car I mention was strictly a garage queen, and one which was eventually never even driven or left on the street. Thus the protection that a wax could've offered was not really a major consideration "to a point".
Perhaps all I can further offer, if you're looking for the last little degree of gloss that any certain product can possibly offer, is the experimentation of a few different waxes, and/or sealants.
I guess then, once you find the one you like best, stick with it. You might possibly like the more sterile hard gloss of a sealant.
There's many great beauty waxes sold here, Pinnacle, Wolfgang, Blackfire, and dozens more. And many fantastic sealants, Wolfgang WGDGPS 3.0 comes to mind. Top with Pinnacle Crystal Mist Spray.