I wet the car down with a slow stream of water. Then foam the car with the cannon. Rinse off the car with the PW. If there is soap left in the gun, then Ill spray the car again, then wash using two bucket method.
For cars getting the full detail, I use 1- 2 oz. of
CG WnG, then the rest water. For maintenance washes I just use the regular
AG foam gun.