The Oakey Liberty Green Sanding Block is a washable and reusable. Ideal for: wood, paint, varnish, plaster, filler and metal surfaces. Use the fine/medium block for sanding surface imperfections and creating a surface key on hard-to-reach or large surfaces. Use the medium/coarse block for sanding rough or built up surfaces and sanding imperfections on hard-to-reach or large surface areas. Oakey Liberty Green Fine/Medium Sanding Block for sanding surface imperfections and creating a surface key on hard-to-reach or large surfaces. OAK58593