You can use it even on the wet car. All you need to do is spray and wipe it off with the included micro fiber cloth. It brings out all effects of “gloss”, “water repellence” and “anti-fouling”, and makes your car look cool. The effect lasts far longer and makes daily maintenance easier, when using this on the dry car. Not only can you use it for car body, but also for unpainted parts made of resin such as car visors or around wipers. Any colors of cars are compatible with this product.