I recently purchased a pressure washer and I love it. I just got a mtm foam cannon and was wondering how useful is it to foam the car if it's not very dirty? I am trying to save water and tine so I would first foam the dirty car let it sit then rinse off completely then wash with one or two buckets and a mitt then rinse and dry. Can car wash soap emulsify dirt when used as a foam? Has anyone ever used ONR in a foam cannon?