MP (Mechanical polishing): e masani ona faʻaaogaina mo le faʻamaʻi faʻamaʻi, pu, ma matasi i luga o paipa uʻamea. O lona susulu ma lona aafiaga e faʻalagolago i le ituaiga o auala e faʻaogaina ai. E le gata i lea, o le faʻamalo faʻainisinia, e ui lava ina matagofie, e mafai foi ona faʻaitiitia ai le faʻafefe. O le mea lea, pe a faʻaaogaina i siosiomaga corrosive, e manaʻomia togafitiga passivation. E le gata i lea, e masani ona faʻamalo mea toega i luga o paipa uʻamea.