Ko te pepa kōtaha teitei e mōhiotia ana mā tana paku pāpaku, e neke atu i te 400 grit ki te 2000 grit, ā he whakamahinga matua nui ki ngā wāhanga whakamutunga o te tukatuka i ngā mata me te whakapai ai, ina hiahiatia ana he mata parurenga, horohoro. Ko ngā pāpaku iti, kīato huihuinga ki runga i te pepa kōtaha teitei e wehe ai i te iti noa o te tapawhā, anō ko te aronga ki te whakapai i ngā torehuruhuru mai i ngā pepa kōtaha kauta ake, ā whakapai ake i te raka o te mata. Ko te mea nui nei mō ngā whakamahinga e hiahiatia ana te āhua me te kounga o te mata, pērā i te tukatuka motukā, kei reira ka whakaritea ngā mata paint ki te whakauru konumohe, whakaputangia hoki i ngā torehuruhuru, ā whakapai ai i te raka marowhenua. Ki te mahi rakau, ko te pepa kōtaha teitei ko te whakamutunga o ngā tahumaero i mua i te whakauru i ngā tio, ngā paina, i te varnish, kia tino parurenga te mata rakau kia pai ai te whakauru, ā kia ata mōhio. Ka whakamahia hoki mō te whakapai i ngā mata metara ki te raka papaku, ā, ki te hanga hoki i ngā taputapu hiko, i ngā taputapu mātātoko, kei hea hoki te iti rawa o ngā ngoikera e pa ana ki te mahi. Ko te pepa kōtaha teitei he mata parurenga, he whiti hoki te papaki, pērā i te pepa, i te kiriata, e āwhina ai i te maimoatanga māmā, e iti ai te mōrearea ki te whara i te mata. He maha o ngā pepa kōtaha teitei e wātea ana i te wai, e āwhina ai i te maimoatanga ki te wai – he tikanga e whakapai ake ai i te parurenga o te mata mā te whakakaha i te mata, e here ai i ngā pāpaku kia katoa ki te pouri, ā e muru ai i te āhuatanga o ngā torehuruhuru hou. Ko tēnei momo pepa kōtaha ka whakamahia hoki mō te whakapai i ngā taonga metara, i ngā pounamu, ā, mō ngā ratonga niho hoki mō te whakauru i ngā taputapu niho. Ahakoa te whakamahinga e ngā tohunga e rapu ana i te mutunga kia pai rawa, i ngā hoahoa e hiahia ana ki ngā putanga kia rite ki te tohunga, ko te pepa kōtaha teitei he mea nui hei eke i te mutunga mai i te whakamahinga takitahi ki te mutunga kia rite ki te tohunga.