A cikin yanayin amfani na ainihi, don yin kayan aikin bututu na bakin karfe (ƙwanƙwasa bakin karfe, tees na bakin karfe, bakin karfe babba da ƙananan shugabannin, bakin karfe, da dai sauransu) mafi kyau da kuma dorewa, akwai jiyya daban-daban. Bari mu yi amfani da bakin karfen gwiwar gwiwar hannu a matsayin misali don gabatar da wasu hanyoyin jiyya na gama gari.