Solar radiation, heat, and moisture are acting synergistically on automotive paints inducing microscopic ageing processes. With time, these effects accumulate into macroscopic changes, and ultimately failure of the car paint.
Several national and international standards are available for determining the environmental durability of automotive exterior materials. Two of the most widely used and referenced test methods are ASTM D7869 and SAE J2527. The question often arises as to which is better, faster, or more suitable for car paint systems
