Look up the MSDS for QID... it is mostly water.
Regarding your APC comment... APC does not "attack" paint coatings. It cleans them. I assume you're referring to the change in hydrophobic properties on paint coatings when using some cleaners... this is due to the change in surface tension, not because the coating has disappeared.
To quote wikipedia... "Surface tension is the elastic tendency of a fluid surface which makes it acquire the least surface area possible. "... It is a fluid property. High surface tension yields pretty beads (water covering less area), while lower surface tension results in a flat appearance (water covering more area).
Surfactants (found in nearly every cleaner or soap) will lower surface tension, which is why many of us may think that by simply spraying an APC or heavy concentration of shampoo onto a surface that protection is gone, but in reality the only thing we know for sure is that the surface tension was reduced. There is no way to know if the protection (coating, wax, or sealant) is actually removed without some advanced testing..... but that is a can of worms all on its own.