Mildly abrasive substances are called metal polishing compounds. They are used in the process of removal of contaminants from the paint and they also help in smoothening by removing a small amount of paint from the surface. These metal polishing compounds are mostly used in eliminating light scratches to facilitate unquestioned finishing of automobiles and enhancing their shine. Multiple types of polishing compounds are available to use for different workpiece surfaces like tan bobbing, black emery, brown Tripoli, white rouge, red rouge, etc.