ʻO PPGI ka papa kila i uhi ʻia (galvanized, aluminized zinc, nickel-plated, etc.) surface chemical treatment (degreasing, phosphating, chromic acid passivation), a laila uhi ʻia me ka pena, a laila hoʻomoʻa ʻia nā huahana.

Pōmaikaʻi: Loaʻa iā ia ka ikaika mechanical o ka pā kila a me ka maʻalahi e hoʻohālikelike i ka hana, a ʻo nā mea organik he mea hoʻonaninani maikaʻi a me ke kūpaʻa ʻino.

Hoʻohana: hoʻohana nui ʻia i ke kūkulu ʻana, nā mea hana halenā lako, nā hale aupuni a me nā ʻoihana ʻē aʻe.