As the title suggests, can a coated PPF (Xpel) be polished/paint corrected to remove water spots and/or old coating without damaging the PPF? I'm not referring to a heavy compound, something more akin to GG Perfecting Cream.
Yes. Just use a white pad and light pressure. Remember it does have a clear coat finish but don't go trying to "correct it" with pressure or heat as you'll burn through it. Otherwise, yes, any good polish or AIO will work just fine.