This is packaged as a kit, but it doesn't include a cloth, polish or wax, and storage for the clay is just a resealable plastic bag. You get 500ml of lube, but just 100g of clay, so it looks expensive ...

Clay bars are the conventional way of doing this but they can be tricky to use, because they need to be kneaded into shape, constantly turned and lubricated. If you drop them, they must then be ...