My place to talk about auto
Both are suitable, and can be purchased at most grocery stores. I have seen recommendations for two separate sponges to be used, one for the wheels and one for the chassis, if you would like. After you have rinsed the soap off of your car, it is a good idea to dry the outside of the windows, at least. It is best to wipe down the windshield and windows inside the car with some household glass cleaner and paper towel. A rubber protection spray can be good to apply to your tires after car washing.