What contributes to the good condition of the paint on the "Southwest Pieta" in Arizona after years outdoors?

The answer highlights the significance of applying three clear coats over the spray paint, which greatly enhances the durability of the paint. Clear coats serve as a protective layer that shields the underlying paint from environmental factors such as UV rays, moisture, and physical abrasion. This layer helps to prevent fading, chipping, or peeling caused by prolonged exposure to outdoor conditions. By utilizing multiple layers of clear coating, the artist maximizes the lifespan of the paint on the "Southwest Pieta," ensuring that it remains in good condition over the years despite being outdoors.

Other options may relate to different aspects of paint preservation, such as the inherent qualities of the materials used or environmental factors, but the specific action of applying clear coats is fundamental in directly preserving the paint's integrity against outdoor elements.