Accumulator said:
.....I've also had issues like this related to whatever products I used *before* the wax, like the wax effected a solvent action on the underlying stuff.
.......-Too much moisture in applicator
-Working too large an area at a time
-Not "working" the wax enough/putting it on too thick
Great comment, Accumulator.
You have a valid point.
Environment.
Certain waxes are more sensitive to draft/air movement (affecting curing), and humidity. Sometimes they're ok, sometimes they leave behind a smudgy stubborn film/haze that could be easily removed or not even budged by quick detailing sprays. IMO, Meg's classic No26 paste wax is such an example. Even washing with Meg's shampoo could not remove the problem completely. In certain weather Meguiars NXT could also be fickle.
What's under the waxThe kind of polish you used, could react adversely with your LSP.
IMO, AG's SRP when topped with certain pure synthetic waxes could be problematic. Find a combo that works in all weather and stick to it.
Applicator - wet or dampThere is a difference. Some LSPs are problematic if applied with a damp applicator.
Interestingly, many carnauba paste waxes such as P21/S100, Dodo Orange, Dodo Blue Velvet, Zymol, and the entire range of Swissvax have never given me these problems.
The worst culprits, based on the brands I've tried, are those attractively packaged Japanese hard waxes by Soft 99. Many types are susceptible to hazing/blurring/smudginess.
As with any LSPs, I will always experiment to discover the optimum application technique that works for me. Different pads, wet/dry pads, thin/thick layer, waiting time, buffing cloths and weather.