The dirtier your car is, the thicker the foam should be. The Foam King Foam Gun Car Wash Sprayer doesn't need a pressure ...

We loaded up our DUSICHIN foam gun with about 20% Meguiar's Gold Class Car Wash, and hooked it to a 1.76 GPM SunJoe pressure washer, which despite making less than the recommended 2.0 GPM ...

Washing a car by hand versus using a car wash comes down to how much you value your time and certain considerations pertaining to your vehicle.