of application as small changes in composition can change the viscosity of the mixture significantly in weight percent the preferred amount of particulate material is in the range of about 20 to 85 and the most preferred amount is in the range of about 60 to 80 the second layer of the coating system comprising a mixture of a polymeric material and a particulate material may be applied by any of the methods described above for the first layer comprising a polymeric material the method used for the first layer may be different than that used for the first layer however depending on the physical characteristics of the mixture for example the first layer may be sprayed and the second spread nonetheless the preferred method for applying the second layer is by spreading manually or in an automated or semi automated manner if the surface to be coated is cylindrical in shape the most preferred method is by feeding the mixture onto a blade held parallel to an element of the cylinder and at a distance suitable to control the thickness of the layer the mixture is then allowed to flow off of the blade onto the cylinder surface as a smooth sheet of uniform thickness the preferred thickness of the layer comprising a mixture of polymeric and particulate materials is in the range of about 0 05 to 3 2.