Abstract: A composite metallic roll or other member comprising a body member of a base metal, a porous plasma flame spray plate of a nickel chromium alloy, and a continuous film of a Teflon deposited over said plate and impregnating the same for gradual exposure over a predetermined life. The corresponding method comprises the steps of applying the plasma flame spray plate with a porous finish and a subsequent application of a thin uniform deposit of a Teflon (tetraflouroethylene). The Teflon is thereupon heated to and is above its fusion temperature whereby to provide an impregnate film for gradual exposure over a predetermined life.