Non-woven material can be used for both wet and dry hand scuffing as well as with a sanding machine. Type S Ultra Fine (Grey) is particularly effective for the roughening between coats when using 2-component paints and primers. The material is flexible and follows the shape of the working surface.The material is flexible and follows the shape of the working surface. _x000D_ _x000D_ Type Ultra Fine. Grey. 150 mm x 230 mm.