How to Mix IPA for Inspecting Correction Results
If you're dead set on removing any previously applied wax or paint sealant by chemically stripping the paint, then a combination of using both a 10% solution of IPA to Water followed by wiping with Mineral Spirits should remove most, if not all, of any previously applied wax or paint sealant.
Personal Recommendation For Removing Waxes and Paint Sealants
To remove any previously applied wax or paint sealant, I recommend using a light paint cleaner or a light polish applied by hand or machine. A light paint cleaner or abrasive polish will effectively remove any previously applied wax or paint sealant AND leave the paint looking clear and glossy. I call this working forward in the process because the goal is to create beauty.
Chemically stripping the paint will tend to dull the paint; it certainly doesn't increase gloss and clarity. You don't see the dulling effect unless you're working on
black paint and repeat the process multiple times. Since not everyone works on black paint, and you're not going to make stripping your car's paint a daily routine, it could be you won't see the dulling effect on your car's paint but it does take place.
Wiping a clear coated black finish
over and over and over again with any type of solvent isn't going to make the top clear layer of paint
more and more clear, it's going to do the opposite, that is
dull it down.
So chemically stripping paint is what I call
working backwards in the process. I, personally, prefer to
work forwards in all my detailing projects but do understand the reasons why some people want to chemically strip their car's paint, or their customer's car's paint, and each person can decide what the best approach is for their needs.
And again, since you're not chemically stripping the paint as a "practice" but only during a detailing session, the dulling effect is not an issue, but I wanted to point it out just for the most detail oriented detailing enthusiasts or Pro Detailers reading this article.