Igwe na-egweri mmanya
Igwe na-egweri mmanya dị mma maka iwepu akwa oxide, cracks, scars na ntụpọ elu ndị ọzọ site na ọkara na nnukwu nkọwa nkọwa. Ọ na-eme ka mma elu ụlọ mmanya dịkwuo mma tupu ọ tụgharịa, nyocha ma ọ bụ gụchaa. Akụrụngwa na-akwado ichikota akpaka na polishing. Enwere ike ịgbanye isi ihe na-egweri na-akpaghị aka, a pụkwara ijikọ mmanya ahụ site na isi ruo ọdụ maka nhazi nke ọma. Mgbe egweri ihe, enwere ike kewapụ ihe ahụ na-akpaghị aka ma bufee ya, na-ebelata njikwa aka na imeziwanye mmepụta ihe. Ngwa a na-ahụkarị gụnyere ntụ oyi nchara nchara, imecha ihe mmanya alloy, nkwadebe mmanya na-egbuke egbuke na mmelite mma tupu arụ ọrụ ma ọ bụ nyocha nke ala.