I've never seen a coating or wax slip off a car and pile up on the ground surrounding the car. Whether it was applied to the paint or a sealant previously applied to the paint.
My friend Mosca said that a number of years ago when the issue of one product bonding over the other product came up and I though it was fairly descriptive and accurately reflected what I've seen in my life.
There was time before discussion forums where I layered waxes as a normal procedure when detailing cars, back then no one called it layering because conversations were restricted to two or three people talking in a garage, not thousands of people dissecting every subtle nuance of a topic in a cyber garage, a discussion forum like this one.
After buffing out a car I would apply M20 Polymer Sealant, this would seal the surface and make the surface incredibly slick. (reduce future potential for toweling marks). Then I would apply M16 Professional Paste wax, this would be a thin coat and I would let it dry for an hour, then carefully remove.
Never seen an instance where the M16 didn't stick to the paint with the M20 previously applied.
I know it's fun to discuss thing in great detail but at some point it's also easy to over-complicate something that is actually quite simple. That is actually the norm for forums, the challenge is to resit getting caught up in it and bring the conversation back to real world principals.
Reminds me of the recent conversations about the OPM ranges on the current dual action polishers as an example of discussing topics in great detail. In the real world it doesn't matter at all what the OPM range of dual action polisher is because to remove swirls you're going to put the polisher on the 5.0 to 6.0 speed setting, to apply a wax or paint sealant you're gong to use a slower setting like the 3.0 to 4.0 speed setting.
Both removing swirls and applying a wax or paint sealant can be done using a Porter Cable 7424XP, a Griot's Garage ROP or a Meguiar's G110v2 by a
first-timer to machine cleaning and polishing and they could potentially never know what the OPM for the tool and the different settings are while using the tool.
It might be nice to know all about the technical aspects of the tool for your head knowledge, like the OPM scale, but in the real world you're going to go out into your garage and use either a high speed or a medium speed to get the job done.
