All too often, professionals and consumers alike conclude that this occurs because the aluminum was improperly or inadequately prepared or primed prior to the application of paint. After all, the failure is one of adhesion; the paint has failed to “stick” to the aluminum, right? Although this scenario does occur, it is, in fact, much less common than anecdotal reports would indicate. In most cases, the cause of the corrosive wound is a result of damage—even minuscule in size—that allows water to reach bare metal. Once the process begins, it’s difficult to stop.