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Google Reader Shared I want one of these
I really have no need for one unfortunately. Sure pre-soaking is a great way to help avoid swirl marks by removing most of the bad stuff, but it is a bit overkill. You also either need a pressure washer (cheap electric one will do) or you can hook up a foam gun to your regular hose, however it will require a high concentration of soap to foam at all and may eat away any sealants or polishes on the vehicle - perhaps even wax depending on the soap.
Anyway…one can drool…