Most likely some other object has dripped rust onto the copper, which can be removed. Copper does not rust, but it does form a green patina over time.
Oxidation
A painted exterior will maintain it's appearance for years with minimal touchups and cleaning. A stained interior will last no more than two years without re-application.
Lighting on the exterior of your house.
If it's on the exterior of a house, it most likely is not a fungus (white mold, for instance), as the environment would not support that growth. It is probably mineral salt crystals called efflorescence, which is white in appearance.
The paint is on the exterior of the car.(example) I just painted the exterior of my house to raise its value
To prepare for your house's exterior painting job you need to decide how much paint you need and what color paint you want to use. dutchboy.com/projects/faqs/exterior/index.jsp
Measure the exterior foundation and multiply length times width.
In "The Fall of the House of Usher," the appearance of the house is dilapidated and crumbling. This is similar to the appearance of Roderick Usher, who looks old and tired.
-Interior is like the inside of something like the inside of the house is the interior etc. -Exterior is the outside of something like the outside of a house or a car etc.
This Old House - 1979 Exterior Improvements - 32.6 was released on: USA: 10 November 2012
I believe sherman williams have a tons of paint for you to choose from. It certainly will have something you can do painting of the exterior of house with. I mean it would make sense if it did.
Copper