ʻO ka ʻoki ʻana i ka wai he ʻenehana holomua e hoʻohana ana i ke kahe wai kiʻekiʻe a me kahi hui abrasive e ʻoki i nā mea. Ma ka hui ʻana i ka wai a me nā abrasives a laila kaomi iā lākou, ua hoʻokumu ʻia kahi jet kiʻekiʻe, a hoʻohana ʻia ka jet e hoʻopili ai i ka mea hana i ka wikiwiki kiʻekiʻe, a laila e loaʻa ai ka ʻoki a me ka hana ʻana i nā mea like ʻole.
Hoʻohana nui ʻia ka ʻoki ʻana i ka wai i ka aerospace, ka hana kaʻa, nā mea kūkulu hale a me nā māla ʻē aʻe. Ma ke kahua aerospace, hiki ke hoʻohana ʻia ka ʻoki ʻana i ka wai e ʻoki i nā ʻāpana mokulele, e like me ka fuselage, nā ʻēheu, a me nā mea ʻē aʻe, e hōʻoia ana i ka pololei a me ka maikaʻi o nā ʻāpana. I ka hana kaʻa, hiki ke hoʻohana ʻia ka ʻoki wai wai e ʻoki i nā paneli kino, nā ʻāpana chassis, a me nā mea ʻē aʻe, e hōʻoia i ka pololei a me ka maikaʻi o nā ʻāpana. Ma ke kahua o nā mea kūkulu hale, hiki ke hoʻohana ʻia ka ʻoki ʻana i ka wai e ʻoki i ka marble, granite a me nā mea ʻē aʻe e hoʻokō ai i ke kālai maikaʻi ʻana a me ka ʻoki ʻana.