Painter and muralist Isabelle Ewing has achieved something that many artists twice her age haven’t—a powerful signature style. Much of her work foregrounds women as its subject, rendering them in bold, marbled colors. Ewing achieves this effect by layering paint upon paint before sanding her piece to reveal the hues beneath, creating results that sometimes surprise even her. “I love the unexpected,” she told me when I visited her Bushwick studio. She’s brought that openness to walls from Brooklyn to the Massachusetts Museum of Contemporary Art.