The Wash Stage is about as basic as it gets. You'll need a clean car to achieve the best possible finish and ensure that protective coatings adhere properly. A soft wash pad and decent shampoo are the bare necessities. A soft microfibre drying towel, Scratch Shields and the two bucket method are strongly recommended. Also, don't forget the pre-wash stage - whilst not essential, products like snow foam are great fun to use and are recommended for tackling heavily soiled vehicles, making washing easier and safer. Prevention is better than cure.