Polishing sponges and discs for an ultra-smooth finish. It takes time and effort to get a great-looking finish, but it can be tough. With sponge polishing pads and discs from Bosch, you can deliver a quality finish across a range of materials, such as stone, plastics and non-ferrous metals. Our felt polishing discs are ideal for waxing and pre-polishing scratched, dirty surfaces and curves. Combine a foam, felt or lambskin polisher sponge with a grinding paste for extra-smooth results.