Geoff, The times I have had it done , the only thing the plastic will take off is the paint. It does not even get into the primer. It is pretty gentle and that is why it does not warp metal panels. When GM was having all of their problems with their water based paint, they used plastic media to strip their warranty cars.In fact,after stripping, the only prep they gave the car before paint was a light DA. The shop I use is in the midwest. Sorry
Bill