... back board,Street Sign, PP caps, Cell mask and so on.6.Surfact Quality : be free from Oil Stain, Dent, Inclusion ... , Scratches, Stain, Oxide Dicoloration, Breaks, Corrosion, Roll Marks, Dirt Streaks and other defect which will interfere with ... ,FCA12.Payment: T/T or L/C at sight aluminium sheets