Abstract: A process for preparing a multiple layer coating on the surface of an organic polymeric substrate by means of atmospheric pressure glow discharge deposition, the steps of the process comprising depositing a layer (first layer) of a plasma polymerized, optically clear, organosilicon compound and thereafter in a second step depositing a substantially uniform layer (second layer) of a polymeric siloxane or silicon oxide compound onto the exposed surface of said first layer, wherein the multiple layer coating has a thickness of at least 2.0 ?m and an abrasion resistance demonstrating a change of 20 delta haze units or less after 500 Tabor cycles, measured according to ASTM D1044, CS10F wheels, 500 g weight.