MeeoP.n.I" Pre-painted St••1 Coli/Aluminum Coli is produced by a complicated continuous coil coating process. OUT pre-painted steel coil/aluminum coil is a high quality product manufactured under strict quality control in the coil coating process; it offers users a unique combination of advantages: the strength of steel/aluminum. the corrosion resistance of a metallic coating, the beauty, and additional corrosion protection of paint. The coil coating process allows different coatings to be used on the two sides of the metal strip, so the possibilities are endless. They are used for general industries and outer case of household appliances.