My car is in a garage and for scheduling conflicts I was going to polish today and seal tomorrow (all with an old porter cable buffer), leaving my car in the garage the whole time. The door will open a few times while I work and then when my wife comes home, but otherwise very little exposure to the outdoor elements. Should I do a light ONR wash before I apply the sealant tomorrow, or will it likely be OK? I`m sure a light layer of dust in the air will settle on the car even while being in the garage, but I`m not sure how concerning that really is.