Felt bobs work best as a substitute for cotton for polishing anything. Cotton has a propensity to leave lint or fuzz on the item you are cleaning, which is not ideal if you want to preserve your collection. Polishing bobs for felt are made from actual sheep's wool. Felt polishing bobs are widely used to polish equipment and metals. They work well to get scratches and imperfections off of metal surfaces. These polishing bobs work wonders for buffing wooden surfaces, such as furniture, handrails, cabinet doors, and boat hulls. Spartan Felt only uses are the highest-quality materials in the research and engineering of its goods, which are well praised.