1. Ukudlidliza.
Uma isikulufu sigqwalile, asivunyelwe ukususwa ngenkani ngesikrufu. Thepha isikulufu ngesikrufu, wephule ama-sundries endaweni egqwalile, jikisa isikulufu kwesokunxele nakwesokudla ngesikrufu, bese ungakwazi ukususa isikulufu. Yahlakazwa.
2. Umlilo.
Uma isikulufu sigqwalile kakhulu, ungasebenzisa i-welding kagesi ukuze wenze isikulufu se-oxidize, ushise isikulufu sibebomvu, bese uphonsa uwoyela wokugcoba esikhaleni sesikulufu, ulinde isikhashana, bese ususa isikulufu ngesikrufu.