ʻO ka pena ʻenehana wai, ka mālama ʻana i ka kaiapuni, ka lapalapa a me ka pahū, kū i ka waika a me ka alkali corrosion kū'ē, anti-kahiko melemele, ka wai kūpaʻa, nā ʻili i uhi ʻia i ke kala anti-kahiko, mālama i ka waihoʻoluʻu mau loa, ikaika ka uhi ʻana i ka wā kahiko. , ka pāhawewe anti-ultraviolet, ka mahana wela o 60-80 degere me ka ʻole, haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa 40 degere ma lalo o ka ʻole me ka ʻole, blisters 7 * 24 mau hola me ka ʻole, Hoʻonui maikaʻi i ke ola lawelawe o 6-10 mau makahiki. ʻili, paia, pā sima, pōhaku lepo, pōhaku, aniani, ʻilika, pāpaʻi aluminika a me nā ʻano mea hoʻonani a me ka pale ʻana o ka ʻili metala.