He kumu nui ka huahana, me kona kūpaʻa corrosion maikaʻi a me ka pale ʻana i ka oxidation, lawelawe maikaʻi i ka hoʻoikaika ʻana, ka pale a me ka mālama ʻana i nā mea wela i ke ʻano o ka pahu mesh, ka hale pōhaku, ka paia kaʻawale, ka uhi paila a i ʻole ka pā moa i ke kūkulu ʻana, ka ʻaila, kemika, ʻoihana hānai, māla a me nā ʻoihana meaʻai.