Fantastic tool, i wouldnt be without mine, use it for pre-soak & then use it for washing the car, to try & get the safest wash, i have the gilmour in 1 hand & mitt on the other, foaming & wiping as i go,flooding the dirty off then rinsing the mitt in a bucket after each panel.
Quite expensive but well worth it, if you like to try & keep your car swirl free.