Not to start up the whole "Dawn will destroy your seals/paint/car" debate, but uhm, well, neither of your ideas will really strip what you have on there anyhow.
Dawn won't remove KSG. Proper (i.e., gentle) claying won't either (I spot clay my MPV at every wash and its KSG lasted over a year). You need a different approach.
Ideas that will work and won't mess up anything include:
Use IPA (rubbing alcohol) to remove the
Klasse and wax. It works.
Use a decontamination system from AutoInt or FinishKare.
Use a dedicated paint cleaner.
Just let the polish cut it all off on its way to the paint.