I have only used it a few times when i borrowed it off a mate when i detailed my old impreza.

that must have been kept under trees or something as the amount of black shit that would come out from under the roof gutter plastic bits was unreal. the snow foam seemed to work pretty well at getting this out where normal washing wouldnt touch it

it was only after a few uses that my mate wanted it back to find that i had used half of his 5L bottle... apparently you are supposed to dilute it

still, it done the job lol