How Do I Paint Copper Pipe?
Copper piping is made of copper tubing that channels running water to faucets or drains away waste water. In either case, as long as the copper plumbing has been properly prepared and the correct paint is used, you can paint copper plumbing successfully for decorative, aesthetic or practical purposes.
Preparing
Lightly sand the outside of the copper tubing to remove all of the oxidation. Use a fine 400-grit sandpaper, and sand until the copper is shiny to the eye
Primer
Topcoat