A wide range of metal working lubricants are available in industry. For stamping of prepaint sheet metal roofing panels, 1% oil in water emulsion was used. However, it is not clear if the lubrication condition is sufficient for different die radii and different prepaint products. Therefore it is of interest to investigate the effect of lubrication on the quality of coating surface after forming. In this study,three lubrication conditions including 100% Zurn oil, 1% Zurn oilin water emulsion, and no lubrication were selected to conduct bending under tension tests.