Hand Washing vs Car Wash Hose(High Pressure)

Nothing wrong with hand washing your pride and joy. Just make sure that the mitt you're using is clean. You can scratch a car's finish easily with a piece of road tar that stuck to your mitt.

BTW we power wash, mitt, then power rinse $100k Lexus' EVERYDAY at the dealership. And we don't turn anyone loose with a buffing wheel that doesn't know what their doing. Swirls can be removed, burnt paint can't be repaired.