Iecaianoaaiiuo o ka anuu kaha kiʻi aila māwae paipu hiki ke anu-owili, anu, anu, anu, anu-hui hana. Ke hoʻohana nei i ke kaʻina hana kiʻi, kahi mea hana maʻalahi, haʻahaʻa haʻahaʻa, hana maʻalahi a mālama a pēlā aku. Akā ʻo ka drawback ka pae waena o nā mea he nui, ka nui o ka lāʻau. Ka hoʻohana anu kaʻina lako mea oi paʻakikī, a oi hoʻokomo kālā, akā, hiki ke hoemi i ka waena kaʻina hana, hoʻomaikaʻi i ka hua, kiʻekiʻe seamless kila huahana nui, a me ka ili pololei, o ka oi aku no ka kiʻekiʻe-precision seamless a me ka lahilahi-paia seamless paipu.

Ma muli o ka palena o ka wili wili ma ka helu a me ke kumukūʻai o nā kikoʻī huahana hiki ʻole ke nui loa; anu-'ōwili a anu a me ka anu i huki hui hana kaʻina hana e hana i ka huahana i pau, me ka maikaʻi maikaʻi kila kaʻina hana pōʻaiapuni manawa pōkole, e ho'ēmi i waena degreasing, wela lapaau, maule, Jiao pololei kaʻina hana, e hoola ikehu, hoemi metala hoʻohana, emi maka mea kiko'ī a me pela aku. Hiki ke hoʻokaʻawale ʻia ka ʻaila ʻaila ʻaila ʻaila pickling acid, hydrochloric acid, hui pū ʻia, hydrofluoric acid a me nā mea like. ʻO ke kila kalapona a me ke kila maʻemaʻe ʻole kūpono i ka waikawa sulfuric, ke kila hoʻolālā kalapona kiʻekiʻe a me ke kila hoʻoheheʻe ʻia kūpono kūpono i ka waika hydrochloric.