Originally Posted by sq40
Do you need a compressor/power washer with that thing? Should you use any type of home powerwasher on your Z at all?
No, you don't need any additional pressure for a foam gun. All you're trying to do is have the soap remain on the paint longer than if you used the two bucket method. (soap+water in one and clean water in the other) This allows the soap to attach itself to the dirt and lift it away from the paint before you go over it with the mitt, thus reducing the chance of marring the paint surface when you wash. Ever notice how a good portion of your soap/suds ends up on the ground under the car while you're washing?
I would not use a home powerwasher on automotive paint. Do you really
want to blast dirt into your paint?
A seach for foam gun
at autopia.org will provide additional info and opinions.