Bronze sculptures are prized for their beauty and durability, but exposure to pollution can lead to corrosion and discoloration. To preserve these artworks, several protective coatings are commonly used.

1. Microcrystalline Wax – A popular choice for outdoor bronze sculptures, wax forms a barrier against moisture and pollutants. It requires regular reapplication but is reversible and non-invasive.

2. Lacquer (Acrylic or Nitrocellulose) – Lacquers provide a durable, glossy finish that shields bronze from sulfur dioxide and acid rain. However, they may yellow over time and need maintenance.

3. Inhibitive Coatings (Benzotriazole-Based) – These chemical coatings slow oxidation and prevent green patina formation, ideal for sculptures in urban environments.

4. Patina Sealants – Clear acrylic sealants lock in desired patinas while offering UV and pollution resistance, often used in public art installations.

5. Oils (Linseed or Tung Oil) – Traditional and eco-friendly, oils penetrate the bronze surface to repel water and pollutants but require frequent upkeep.

Choosing the right coating depends on the sculpture’s location, desired appearance, and maintenance capacity. Regular inspections and cleaning ensure long-term protection against environmental damage.