MTM HYDRO SNOW FOAM CANNONMTM HYDRO SNOW FOAM CANNON The MTM Hydro Snow Foam Cannon is the perfect tool for any car enthusiast who wishes to apply a thick rich coat of snow soap to the paintwork! By utilizing a foam cannon you are able to deposit the cleansing solution across the surface to loosen and remove dirt, grime, and abrasive particles before you ever touch the paint. On sensitive surfaces with bonded dirt this can be a key factor in lessening swirls on the surface