Now the Consumer Has a Choice: Oxidized, Pounded, Classic or Patched Copper for Roofing. Patinated Copper is an alread “Aged” Copper Painted in Bright Green, Which Will Not Change in the Next Few Centuries. Oxided Copper — Evenly Stained Brown. In this case, the coloring is not artificial, but Creed by the Copper Itself and Will Change in the Future. Tinned or Tin Copper — Durable Material. The Composition Includes Tin, Which Stans The Roof in Light Gray and Gives it a Bright Metal Shine.