Get a pressure washer that is rated at a minimum of 2200 PSI @ 4.0 GPM minimum, unless brushing. Anytime that a pressure washer with pressures or flows that are less than the recommended minimums are used, brush the vehicle, then rinse.
If the vehicle is extremely dirty, power wash the heavy dirt off before applying the detergent.
When the vehicle is hot, cool down the surface with cold clear water prior to applying the detergent. When the vehicle is cold the use of warm water increases the efficiency of the detergent.
Apply the detergent to the vehicle. Liquid detergent concentrate should be downstream injected onto the surface.
Pressure wash the detergent off, top to bottom. Keep the nozzle close enough to the surface to clean, but not so close that the pressure could damage anything.
Apply Plex-Master through the downstream injector to give the car a protective seal. Pre-dilute ½ gallon of concentrate with 4 ½ gallons of water prior to further dilution through the injection system.
Rinse with clear water then towel the vehicle dry.
Finished.
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