“…In most of the machining processes for ultra-smooth surfaces applied in various fields such as optics, imaging, biomedical engineering, and the aerospace and automotive fields [ 1 , 2 ], polishing is usually required as a final and crucial step to remove defects and to smoothen the surfaces. Different kinds of polishing technologies have been developed, including ion beam finishing [ 3 ], bonnet polishing [ 4 ], fluid jet polishing [ 5 ], plasma finishing [ 6 ], magnetic field assisted finishing (MFAF) [ 7 ], etc. MFAF technology, being one of the most promising technologies in achieving ultra-smooth surface finishing, was first developed in the 1930s and has been widely researched and applied in various industries such as aerospace, biomedical, optics, etc.…”