I totally support Lee's comments WRT pressure washing. You want to gently as possible lift the dirt and grime off your car's surface, not drive it into the paint as a pressure washer will do if the pressure is too high because the operator is (1) holding it too close to the surface of the vehicle, or (2) holding it at an improper angle to the car's surface (i.e., perpendicular to the surface or nearly so). Pressure washing is the "lazy way" vice a proper hand washing using quality wash mit, quality auto wash product, cool car surface, in the shade, etc. etc. IMHO. One additional recommendation an auto detailer passed on to me long ago was to put a tea spoon or two of liquid cooking oil in your wash pail along with the car wash product; it helps to emulsify the dirt so it readily rises to the surface and is suspended in the washing solution prior to floating away when you rinse.

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Fred Prickett
85 500 SEL, 241,500 mi
90 5.0 Mustang LX conv.