Ka whakahouhia te peere mahi tino mai i te peere toka mahi taumaha mo te tino kino o te mahi.Ki te peere mahi tino nui, ehara i te mea he pai ake te whakakakahu i nga rauemi aukati, engari me tika ki etahi waahanga o te peere.Whakatauritea ki te peere toka toka taumaha, ko te peere tino mahi ka mau i nga hipoki o raro, he parenga ngutu mata matua, he pereti whakakaha te taha nui me te matotoru, he takai kakahu o roto, he tutaki me te mau patene hei whakakaha i te tinana me te whakakaha i te aukati abrasive.