Industry The Unique Challenge Case Study: Results and Benefits The Cerfa-Kleen® 5519 worked like a charm. They found it worked best when sprayed directly on the surface, allowed to stand for 30 minutes and sprayed off with a pressure washer. The grease and dirt washed away. Most surprising was that employees who had worked at the plant for 25 years said that they never knew that the walls were actually painted, which was no

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