With all product application, it is important to wear protective gloves. Skin absorbs lotions, creams, chemicals and many things which come into contact with it by drawing the material through the permeable outer layer of the skin, known as the epidermis.
The amount of moisture already present in the skin, the duration of contact and the physical condition and health of the skin determine the amount of product which is absorbed.
Its always best to be safe when maintaining your car, plus they keep your hands clean! You can read more about Protective Gloves here