Solid brass is an ideal material for high-quality belt buckles due to its high stability, durability, and corrosion resistance. It is a robust metal alloy that retains its shape even under daily use. To protect the surface from natural tarnishing and oxidation caused by air and moisture, a sealant such as a special clear lacquer or surface coating is often applied. Alternatively, regular cleaning and the use of protective agents like beeswax or polishing pastes help to maintain the shine and delay the formation of a patina.