Yin amfani da gwangwani na tinplate don tattara kofi na iya hana danshi da lalacewa, kuma ba zai haifar da abubuwa masu cutarwa ba saboda canjin yanayi. Hakanan akwai sutura ta musamman a cikin gwangwani na tinplate don keɓewa da kariya. A lokaci guda kuma, kamar yadda kofi zai iya, bayan bugu, yana buƙatar a rufe shi da wani Layer na varnish don ƙara ƙyalli da juriya na yanki da aka buga, da kuma ƙara wani tauri, don haka murfin saman bugu yana da tasiri. wani mataki na sassauci da juriya na lalata.