To paint a steel door, you will need exterior paint and an oil-based primer designed specifically for metal.
Steel windows are built from bars of various profiles that are produced in rolling mills
Steel doors are comprised of super apoxy paint.
Metal door frames are installed during the framing of the walls. ..
Metal window frames are installed during the framing of the walls.
A major benefit of steel doors is their re-workability. This means that repairs can often be made relatively inexpensively and usually in the field.