The functional requirement of the components as well as safety and aesthetic compulsion make it necessary to improve the surface characteristics before putting it into the useful applications. Therefore, it is important to achieve superior surface finish very close to dimensional precision. Also, 3D components are being found more useful in today's industries which lead to an increased demand for nanofinishing. This article mainly emphasizes on the analysis of magnetorheological methods suited for finishing of various surfaces. The surface is mainly finished by the abrasives hold within carbonyl iron particles chains in magnetorheological fluid during operation. The traditional finishing methods are comparatively less valuable in case of 3D surface finish due to lack of better controllable finishing force and constraint in tool movement. Magnetorheological methods were found to have better control over the forces and more flexibility in tool movement over various types of surfaces. Recently, a new finishing method, the ball end magnetorheological finishing was developed and found more suitable method for finishing of 3D surfaces as its tool moves on surface similar to milling cutter tool during machining. The selection of finishing particles in magnetorheological method plays an important role for ultrafine finishing of new engineering materials.