Metal trash cans are generally made of steel and are highly durable and recyclable. ‌ The advantages of metal trash cans include their high durability and recyclability, which gives them significant advantages in terms of environmental protection and resource recycling. However, the disadvantage of steel is that it rusts easily, so it usually needs to be degreased and rust-removed, and painted to enhance its rust resistance for outdoor use. This treatment not only improves the durability of the steel, but also ensures the appearance and long-term use of the metal garbage can.