Pā kila kila:
Hoʻohana nui ia no ka hana ʻana i nā hale kila, nā alahaka, nā moku a me nā kaʻa.
ʻO ka pā kila welu:
ʻO ka hoʻohuiʻana i nā mea kūikawā (P, Cu, C, a me nā mea'ē aʻe) he maikaʻi ke kū'ēʻana i ka corrosion a me ke kū'ēʻana o ka atmospheric corrosion, a hoʻohanaʻia i ka hanaʻana i nā pahu, nā kaʻa kūikawā, a me nā hale kūkulu.
ʻO ka pā kila kūikawā ʻōwili wela:
Hoʻohana ʻia ke kila kalapona, ke kila kila a me ke kila mea hana no ka hana ʻana i nā ʻāpana mīkini like ʻole ma hope o ka ʻenehana mālama wela.