What to know before a full detail and ceramic coating on an Audi Q7 in New Canaan, CT: what Audi's owner's manual says about pressure washing, sensors and cameras, the windshield, wheels, roof racks, and leather and textiles; Audi paint and matte finishes; road salt and tree sap; the full detail process; paint correction; Formula X's Ceramic Pro and detailing packages; and aftercare.