ʻO ka hoʻopau maʻemaʻe i hana ʻia i ka ʻili me ka helu helu mean roughness, ʻike ʻia hoʻi ʻo Ra, o 1.6 μm (63 μin).E like me ka hoʻopau ʻana i ka mīkini, hāʻawi pū ʻia ka hoʻopau ʻana i ka lihi ʻoi a me ka deburring no ka ʻāpana.No ka mea ʻoi aku ka maʻalahi o ka ʻili ma mua o ka ʻili hoʻopau maʻamau, ʻaʻole ʻike ʻia nā kaha a me nā hemahema.ʻAʻole loaʻa ka hoʻopau maʻemaʻe mīkini me ka hoʻopau hoʻonaninani.

Pono kekahi mau ʻāpana i ka hoʻopau ʻana i ka ʻili ma mua o ka mea i hāʻawi ʻia e ka hoʻopau maʻamau.Ma ia mau hihia, hana ʻia kahi hana machining hou e hōʻemi i ka ʻili o ka ʻili i kahi waiwai kūpono.Ma nā ʻāpana i hana ʻia me nā mīkini CNC, hiki ke hoʻohui pinepine ʻia ia mau hana i ke kaʻina hana e mālama i ka manawa.No nā ʻāpana i hana ʻia me nā mīkini non-CNC a i ʻole nā ​​mīkini he nui, hoʻohana ʻia ka mīkini CNC no ka mīkini maʻemaʻe ma hope o ka pau ʻana o ka hana a mākaukau ka ʻāpana.