Answer
Hand washing is always best its always best to hand wash than to use the damaging high pressure at a auto car wash.high pressure is not always bad though. its always a nice thing to use the high pressure to wash the undercarrage of your car to remove salt and other debris from your car. once in a while a fast run through is ok but not all the time. it dont get it as clean as the old fasion hand bath and chammis dry. looks a lot nicer. once a year a nice buff and wax never hurts either. nice luck,
