The test for this antenna would be to see how well it performs over time under higher ultraviolet exposure from "southern" locations.
Florida, Arizona, and Southern California would be good places to test this question. My past experience with light colored objects in areas with concentrated sunshine has not been good. For example, compare the longevity of a white cable tie with a black one.
White ties crumble in a few months of outdoor exposure, while dark colored cable ties seem to last longer. Ultraviolet rays are the culprit, and unless your materials have been designed to deal with them, the shape of an antenna may very well lose its shape over time.