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Show Spray Painting Corrugated Steel. The corrugated steel used for airplane air-plane hangars in this country and overseas over-seas was painted before shipment. Owing to the large quantity of steel, It was out of the question to do this work by hand and machines could not be used on account of the corrugations. For this reason, a spray system of painting was employed. First, the sheets were coated with red lead before be-fore being corrugated, and after thai they received a coating of green on one side and gray on the other side, applied by moans of a jet 11 Inches wide. Scientific American. . |