Why is it critical to avoid functional defects in paint?

Avoiding functional defects in paint is crucial because such defects can significantly compromise the future performance of the paint. Paints are designed to provide specific benefits, such as adhesion, durability, corrosion resistance, and UV protection. If a paint has functional defects, it may not adhere properly to the surface, may degrade faster over time, or may not offer the protective qualities it promised. This can lead to premature failure of the paint, prompting the need for costly repairs or reapplications, and can also impact the overall longevity and effectiveness of the painted surface. Therefore, ensuring that paint is free from functional defects is essential to maintain its intended performance and longevity.