Abstract: A device for sanding and finishing curved surfaces such as a boat hull includes a longitudinally extending upper member having a handle extending upwardly from a distal end and a motor assembly joined to the proximal end. A belt pulley is secured to the proximal end and driven by the motor, and a variable pitch pulley is supported at the distal end so that an endless sanding belt may be driven about the pulleys. A resilient and flexible pressure plate is secured fixedly to the ends of the upper member to support the sanding belt. The medial portion of the pressure plate is supported by an adjustable, resilient bracket assembly, so that the pressure plate may conform to curved surfaces and the belt may finish such surfaces smoothly and without gouging.