Patinated bronze sculptures are prized for their rich, textured finishes, but surface clouding can mar their appearance over time. The most common causes of this issue include environmental exposure, chemical reactions, and improper care.

1. Environmental Factors: Humidity, pollution, and salt air can accelerate oxidation, leading to cloudy or uneven patina. Indoor sculptures near windows or in damp spaces are particularly vulnerable.

2. Chemical Reactions: Acids from fingerprints, cleaning agents, or airborne pollutants can react with the patina, causing discoloration or hazing.

3. Improper Maintenance: Using abrasive cleaners or waxes can strip the patina or trap moisture, resulting in clouding.

4. Metal Corrosion: Underlying bronze corrosion, such as bronze disease, may manifest as surface clouding if left untreated.

To preserve patinated bronze sculptures, avoid direct sunlight, clean with gentle methods, and consult a conservator for severe clouding. Regular inspections can prevent long-term damage.