DRUM MACHINES HAVE NO SOUL reads a bumper sticker duct-taped to the side of what appears to be a small Fender guitar amp. That sentiment, characteristic of classic rock, expresses a yearning for authenticity that is also at the heart of Kaz Oshiro’s meticulous sculptural practice. Using Bondo (an auto-body repair filler), canvas stretched over wooden frameworks, and acrylic paint, the Japanese-born, Los Angeles–based artist crafts convincing facsimiles of ordinary objects. The amplifier is one such fake—a peek at its backside reveals an unfinished interior, the seam of the canvas stapled