Outdoor metal needs to be protected from the elements. If a piece of exterior metal wasn't painted properly the first time, or is just very old, the paint will chip and peel away as the metal begins to rust. Painting outdoor metal is not difficult, but you must use the right kind of paint made specifically for the outdoors. How to Paint Outdoor Metal | Hunker Please note: You are currently browsing img buy a custom outdoor bust metal sculpture garden decor that is 3488x2848px in size. This image is listed in outdoor metal garden decor category. How to Paint Outdoor Metal Hunker, 3488x2848 in 1,317.14 KB.