Residual oil on rolled aluminum foil prevents good adherence of print or paint. Ozone gas exposure shows promise of effectively reducing the surface hydrocarbons to acceptable levels for industrial coatings (<10% surface carbon). Ozone and thermal treatments performed on laboratory-and industrial-scale samples which were surface analyzed using x-ray photoelectron spectroscopy and further characterized with H2O contact angle measurements. The samples were exposed to oxygen gas including ozone 630 ppm at a flowing rate of 0.5 l/min. Two treatments, heating treatment and ozone treatment with heating, are compared at a heating temperature, 200 degrees C for 6 h exposure time for laboratory-scale samples and 200 degrees C for 30 min and for 160 min at higher than 100 degrees C for industrial-scale samples. The atomic concentration % of carbon (C) proportional to the quantity of oil on the surface was determined to be 9.8% for the laboratory-scale sample and 7.4% for the industrial-scale sample.