YOU KNOW THE STEEL ROOF IS EXPOSED IN DIFFERENT SITUATION SUCH AS RAIN, SUN , SALT-MIST…ECT AND IT’S EASY TO BE DAMAGED AND CAN NOT RESIST LONG -TIME CORROSION . FLDC FACTORY HAS A KIND OF PAINT NAMED OF ACRYLIC POLYURETHANE COP COATING TO PROTECT THE STEEL FOR ANTI-CORROSIVE  AND MAKE THE ROOF  LONG-LASTING .