ʻO ka hōʻailona kila kila he mea hoʻonani maʻamau i hoʻohana ʻia i loko a me waho o nā papa hoʻolaha a me nā hōʻailona.Hana ʻia ia me nā mea kila kila a loaʻa iā ia nā ʻano o ka pale ʻana i ka oxidation, ka pale ʻana i ka corrosion, ke kūpaʻa wela kiʻekiʻe, a me ke kūpaʻa maikaʻi o ka wā.
Hiki ke hana ʻia nā hōʻailona kila kila i nā ʻano like ʻole a me ka nui ma o ka ʻoki ʻana, ke kuʻi ʻana, ka hoʻohu ʻana, a me nā hana ʻē aʻe.ʻO nā ʻano kikokikona maʻamau, ʻo ia nā ʻano palahalaha, nā ʻano hollow, nā ʻano ʻekolu, a pēlā aku.Hiki ke hoʻopilikino ʻia nā leka, nā helu, a me nā hōʻailona i kāu pono.
ʻO ka hōʻailona leka hoʻoheheʻe kila he ʻano mea kila kila ma o ke kaʻina hana wili i hana ʻia me nā māka.Hana ʻia ia me ke kila kila ma o ka ʻoki ʻana, ka kuʻi ʻana, ka wili, a me nā hana ʻē aʻe.