H. Keith Wagner Partnership No, since Corten seals itself and stops rusting we didn't feel the need to. I have not noticed any staining, although the water makes a nice pattern on the steel.

H. Keith Wagner Partnership The beauty of Corten steel is that it has a patented process that allows the steel to rust, but then it seals itself, forming a lasting finish that will not continue to break down. We have also used unfinished steel which will continue to rust and will eventually (in many many years) breakdown based upon thickness. Unfinished steel is much less expensive, but Corten have a great color.