MP (Mechanical polishing): ana yawan amfani da shi don oxidation Layer, ramuka, da karce akan saman bututun ƙarfe. Haskensa da tasirinsa sun dogara da nau'in hanyar sarrafawa. Bugu da kari, injin polishing, ko da yake kyakkyawa, kuma zai iya rage lalata juriya. Don haka, idan aka yi amfani da shi a cikin mahalli masu lalata, ana buƙatar jiyya na wucewa. Bugu da ƙari, sau da yawa akwai sharan kayan polishing akan saman bututun ƙarfe.