4, agul-agul bisa grinded karo agul-agul saw tangan, sampeyan uga bisa nggunakake agul-agul scraping. Sabanjure yaiku welding, kanthi wesi solder listrik pinggiran rata, nggiling cangkeme menyang pinggir piso. Kurang timah sajrone welding, kacepetan welding kudu cepet.