Ppgi Rau Kowakawaka (Prepainted Steel Sheet Kowakawaka) Ko nga mea mata he peera rino kua pania i mua i te peita, ka whakamahia te maitai piauau, te rino aluzinc ranei hei taputapu.I muri i te maimoatanga o mua o te mata (te whakakore matū me te maimoatanga huringa matū), ka pania te mata ki te paparanga, ki etahi paparanga ranei o te paninga, na roto i te tunu me te rongoa, ka waiho hei hua kua oti.