An tanadar da jimillar sassa 8 na hannu don gwajin fata, huɗu daga cikinsu an yi musu alama da launuka daban-daban na ja. Idan an yi musu allurar daidai, za a ga wani picot a fatar, kuma bayan an cire ruwan, picot ɗin zai ɓace. Ana iya yin allurar a kowane wuri sau ɗaruruwa kuma ana iya gyara shi da sealer.