When copper is exposed to air, it begins to age and change color. This is both normal and useful, since the patina coating serves as a protectant for the raw copper underneath. Some people, however, prefer the shiny, “new penny” appearance of raw copper, or wish to restore their copper to a new appearance. To do this requires nothing more than polishing the roof to the desired appearance, cleaning off all traces of the polish, and then applying a specially formulated clear coating to keep the copper looking new. Of these three steps, cleaning & polishing accounts for 95% of the successful results, and most failures are due to skimping during this necessary step.