Great attachment and you can literally paint something white with foam.

Gets a nice even coating of foam /soap on what you are washing. I still like to use a soft car wash brush on an extendable pole used for a paint roller to get things really clean.

I've found that warm water tends to help a lot. Really hot water tends to bake the dirt on in my opinion.

Got mine off Chemical guys on Amazon have been using the thick green honeydew soap which a little bit goes a long way.

Here are some pics not fully painting the truck white but wanted to show how it works.

Thanks to Ron L. for the tip on the foam cannon.