A coating method for sheathing material formed from paper or card for smoking materials or parts of smoking materials in order to reduce the tendency of the sheathing material to absorb and diffuse aqueous or oily substances, the sheathing material being provided on the same side with two coatings, which are applied one on top of the other and are each applied in liquid form in two successive coating steps. In the first coating step, at least one layer of a first coating substance is applied, which reduces the ability of the paper or card to absorb the liquid volatile matrix of the second coating substance; in the second coating step, at least one layer of a second coating substance is applied, which is repellent or impermeable to one or more of the following substances: oils, fats, waxes, alcohols, and water.