O le PPGI o le ipu uamea ua ufiufi (galvanized, aluminized zinc, nickel-plated, ma isi) togafitiga kemikolo luga (degreasing, phosphating, chromic acid passivation), ona ufiufi lea i le vali, ona tao lea o oloa.

Tulaga lelei: o loʻo i ai uma le malosi faʻainisinia o le ipu uʻamea ma faigofie ona faʻaogaina le faʻatinoga, ma o mea faʻaola e lelei teuteu ma faʻamaʻi.

Talosaga: faʻaaogaina lautele i le fausiaina, meafalemeafale, nofoaga faitele ma felauaiga ma isi fanua.