Products such Prep-Sol, and such contain a small amount of xylene added to the mineral spirits. Xylene is regulated in some states due to high VOC release and is found to be carcegentic.
Hog wash on the MS lifting automotive paint, IE-Mequiar`s #7 is mainly MS based, ever heard of it lifting automotive paint in the decades it has been in use?
Modern single and clears are formulated to "resist" the solvents in gasoline, such as benzine, tolulene, etc. As they are high VOC content, quickly evaporate once exposed to air.
Mineral Spirits are low VOC, combustible, not flammable and may be broken down for removal by soap and water.
Using the term proof is opening the door for confusion as proof denotes forever and how does one know in every case of use that there may be factors involved that are counter to use direction etc. Time of "wet` exposure is also a viable issue that may needed to factor in.
If you consider a previous reply as smart ass, so be it, some may consider it so, but such reactions are usually the result of their preconceived opinions or lack of factual based knowledge. Example of such opinions is the lack of understanding of the various types of "paint` coatings which are made up of a resin that creates the important binder and film former, plus that paint is not really "solid" but has pores which are just part of creation of paint films.
Wording in today`s litigation happy world makes it difficult to cover many issues. Example-vehicle warranties covering corrosion, they cover "manufacturering defects", not enviromental exposure to corrosive materials applied to roads.