Now keep in mind, my 2+2 is not a 100 point Trailer Queen, but I do strive for correctness.
I went to 5 auto stores with my amber turn signal lens, and bought a rattle can that was closest to it. Ended up at NAPA. I used Permatex Gasket remover to eat off the black paint, cleaned it,then stood back and lightly misted the center area. I then came over it with some clear before it dried.