Acrylic topcoat is a thin liquid coating applied to the surface of the PVC-coated fabric. Acrylics are generally known to have fair resistance to deterioration by UV light, so this thin coating is expected to erode and wear away relatively quickly, exposing the PVC and the fabric to the elements. As the plasticizers in the PVC migrate to the surface and attract and hold dirt, resulting discoloration of the fabric structure may be a sign that failure of the PVC coating is progressing.
