This type of mounting makes the artwork look like it's floating which creates an interesting drop shadow and 3D effect. ** For indoor or outdoor use. ****Care instructions Our products are made of steel/metal, and powder coated to last for years to come. This means that most of my products are shatterproof and UV-resistant! Clean with mild soap and water. ****Why powder coating instead of other painting methods? Powder Coating is more durable and is safe for the environment. It gives consumers, businesses, and industries one of the most economical, longest lasting, and most color-durable quality finishes available on virtually any type of metal. Powder coated surfaces are more resistant to chipping, scratching, fading, and wearing than other finishes.