A brush assembly comprising a cushion pad and a plurality of brushes secured to the cushion pad. The cushion pad has a 25% compressibility within the range of 6.9 kPa (1 psi) to 2413 kPa (350 psi). At least one of the plurality of brushes comprises: a brush base, and bristles, the bristles comprising moldable polymeric material and abrasive particle additives.