UPDATE: I bought a gallon of the Evapo-Rust gell from NPD. But when I opened it, it was like rubbery scrambled eggs. It would not even stick to metal. So I called the manufacturer, Harris International, and the guy explained that it had a roughly six-month shelf life. He said he thought this may have sat on the shelf too long at NPD. He said to take pictures and send him my address so he could replace it. We shall see..............................................................