Toronto artist Brian Donnelly paints photorealist portraits of disembodied heads against optimistic backgrounds of cloudless baby blue skies. Once completed, he applies corrosive materials, like turpentine or hand sanitizer, to his subjects' faces so that their features melt down the canvas in dripping trails of color. He could easily paint them this way from the start, but in the act of destroying something perfect, his work talks to us about loss, letting go, mortality and the inevitability of time. Stephanie Chefas Projects, 305 SE 3rd Ave., Suite 202, 310-990-0702. Through June 4.