Superfine Steelwool Pad Grade: 0000- Super Fine Flexible sanding alternative Use to remove old finishes, (most stains, lacquers, and protective finishes) without harming the original surface, or to clean and remove rust from metal surfaces. Includes 3 grades of Steel Wool; Coarse: Stripping Grade; Medium: Between Coats; Fine: Finishing Grade. Grades vary from extra course #4 for heavy stripping to super fine #0000 for finishing.