My dealer has a relationship with a PPF shop that, based on my reviews and research, seems pretty decent. They said I could get the PPF (Xpel) done before I pick up the car, which sounds great because the drive home will be about 150 miles. But when I asked about ceramic coatings they talked about Zurich Paint Shield, which from what I've read is the usual dealer crap. So, my question is: are you "supposed" to do paint correction + ceramic BEFORE the PPF, or does it matter? If I get PPF done before I pick it up does it have to be redone for the ceramic coating?