Yes, you can use aluminum coil to make a decoration piece. Aluminum is a versatile material that is lightweight, durable, and easy to manipulate. It can be bent, twisted, or cut into various shapes to create unique decorative items. Common uses include making sculptures, wall art, and even jewelry. Due to its malleability and resistance to corrosion, aluminum coil is an excellent choice for decorative purposes, especially for outdoor decorations where weather resistance is important.