It's important to note that our Pyro Cages are cut from Mild Steel, and are not made from Stainless Steel. We made this decision very deliberately because we were able to make a burn cage replacement that was nearly 2x thicker than the competition while still providing a larger cage for less money. If left out in the elements untreated, the Pyro Cages will develop a layer of surface rust that is an aesthetic issue only. The cages are much thicker and made from high quality American steel compared to cheaper import alternatives. Over time the Pyro Cages will turn a deep, dark red that we find much more natural in appearance than tarnished stainless steel.