When sourcing metal decor, the choice of base metal determines both durability and price point. Stainless steel (304 or 316 grade) is ideal for high-end, corrosion-resistant pieces, while iron or carbon steel is more cost-effective but requires electroplating or powder coating to prevent rust. For premium aesthetics, brass and copper offer a timeless appeal but are prone to oxidation unless treated with a clear lacquer finish. Always verify the gauge thickness to ensure structural integrity, especially for wall-mounted art or large sculptures.