Hello Scott/
I'm not a Detailer...but I do have one of these.I like it very much.
The one I have is made by *Gilmour Products* who make garden hose nozzles/hose repair kits/etc. It has the garden~type gun w/the quick release on the nose that hooks up to the soap canister.I use Blue Coral car soap.
The foamer helps me save on the cost of the soap.IMOHO...the Blue Corral doesn't seem to get as sudsy when poured in to bucket of water.
But It foams great through the Foamer/

.
I first saw one through a friend who does Tint & Detailing.
I truly think that you and your friend will be *Most Happy* w/it's performance & quality and savings on the Car Wash Soap.Mine has an Orange Pistol Grip nozzle.The canister is heavy duty,and there is a soap
adjust rod that can adjust how much foam you want to apply.
Sorry for the Long Winded post..

.Wish your friend all the *Best w/His Business*.Take Care.Oh...*Happy New *2008* to you and yours*

Kind Regards/
Raymond