I bought a gallon of it when Big Lots had them and didn't get a chance to try it out until last week. I'm not too sure how it would work on paint since I used it on my wheels. But from my use on the wheels, it's a good shampoo, lots of suds and decent lubrication. I'm not too fond of the smell though. I got a headache from it. Not too sure what those "polishing agents" are but I know it's supposed to contain some carnauba in it.