Waxing is encouraged, but not required, by the manufacturers as stated in many of the
owner's manuals of many cars.
However, the act of removing defects by means of polishing, cleaning, or even claying is not condoned by many automotive manufacturers. Ford, for example, had issued a bulletin telling owners to never use a clay bar on their newer Ford vehicles. BMW advises owners to use ONLY approved BMW waxes and quick detailer spray waxes. None of their car care products has any cleaner or polishes in it.
Removing defects is simply removing paints to even out the scratches. Why would manufacturers want you to do that? In case there is clear coat failure on a vehicle under the warranty period, the entity responsible for paying for the damage is ultimately the manufacturer. One must understand the reasons for manufacturers to make these suggestions.
Logically speaking, the act of making the paint surface
look "flawless" is indeed removing paint. And the act of removing paint is actualy inducing more flaws onto what was once an original finish. In essence, removing the appearances of flaws on paint surfaces can be seen as inducing more flaws onto the paint surface. You are only removing the appearances of the flaws; you are not magically filling it in. That is why the act of polishing or cleaning is
not suggested by the manufacturers.
The more aggressive non-filling products produced by
Menzerna are intended for OEM production lines and body repair purposes to correct paint defects created during the manufacturing or repairing processes. These products are simply adapted by the enthusiasts for paint corrections in the detailing markets.