Bird droppings can cause significant damage to outdoor metal sculptures, leading to corrosion and aesthetic degradation. To prevent this, consider using physical deterrents like spikes or nets to keep birds away from the artwork. Applying a protective wax or sealant can also create a barrier against acidic droppings. Regular cleaning with mild, non-abrasive solutions helps maintain the sculpture's integrity. For long-term protection, opt for bird-repellent gels or ultrasonic devices that discourage birds without harming them. Combining these methods ensures your metal sculptures remain pristine and durable for years to come.