Spray on, rinse off. Easy as that.
This stuff is amazing. It really is as easy as spraying the stuff on, letting it sit a few minutes and hosing off. For extra grimy spots you may need lightly rub with a brush or rag. I used a sprayer like you'd use for your yard. Let sit for 3 to 5 mins. Hose off. Since it's acid etching the aluminum surface it can stink. Don't breathe in if avoidable. Also, don't do this process in grass. It burns it out come to find out.
Rating: 5 stars