ʻO ke kaʻina hana pena kiʻi no nā kaʻa ua hahai mau i ke ʻano "pena kiʻi huahana uila" (ʻo ia hoʻi, ʻelua ʻaʻahu o ka epoxy red iron oxide primer a ukali ʻia e ʻelua mau lole o ka amino alkyd baking varnish). ʻAʻole i kālua ʻia ka ʻaʻahu mua o ka mea ʻulaʻula iron oxide no ka mea e hana ʻia ana ka mīkini, a he nui ka manawa ma waena o ka ʻaʻahu mua a me ka lua no ka maloʻo. No laila, ʻaʻole i kālua ʻia ka primer mua. Hoʻohana ʻia ka lua ma hope wale nō o ka hoʻokomo ʻana a me ka hoʻāʻo ʻana, a ʻo ka lua o ka primer a me nā ʻelua amino alkyd baking varnishes ma hope mai i kālua ʻia. Ua hahai mau ʻia kēia kaʻina hana me ka pilikia ʻole.
Me ka hoʻomohala ʻana o ka ʻenehana ʻenehana, ʻaʻole hiki i nā ʻano hana lima wale ke hoʻokō i nā koi mākeke. Ua ulu aʻe ka pena spray mai ka manual a hiki i nā kaʻina hana automated, me ka piʻi ʻana o nā pae kiʻekiʻe o ka automation. No laila, ke hoʻohana nui ʻia nei nā laina hana pena spray, e komo ana i nā ʻāpana like ʻole o ka hoʻokele waiwai aupuni. I koʻu ʻāina, ʻoi aku hoʻi mai ka hoʻoponopono ʻana a me ka wehe ʻana, ua hoʻokō ʻia nā mea hana pena spray i ka ulu nui.
