A flexible sanding apparatus includes a thin, relatively flat spring member and one or more coil spring members coupled to a first side of the flat spring member along a length of the flat spring member. A sanding surface may be coupled to a second side of the flat spring member. The flat spring member and the coil spring members may be elongated members coupled together lengthwise. The coil spring member may be a closed coil spring member that allows concave flexing of the sanding surface and inhibits convex flexing of the sanding surface.