What are the products made from?
While weathering steel is usually referred to by its trademark name COR-TEN (or Corten), we use an Australian made equivalent from Bluescope called REDCOR. It is known for its superior corrosion resistance and thickness. This is because the surface of the steel forms a protective oxide layer when  exposed to the weather. In other words, the steel is allowed to rust in order to protect itself. This protective surface layer continues to regenerate over years of exposure.
And it looks AMAZING!