Heat the area to be welded, evenly. As you heat the base, rub the rod vigorously against the heated piece to be welded till rod flows. Never apply heat directly to rod. If you are unsure of the the material, file off some metal and apply the torch. Magnesium will burn white like a flare.
H eat until it starts to flow.
Turn flame paralell to surface and with side of flame, hold at this heat. Heat welding rod to same temperature. Now with both bases and welding rod at this temperature, touch rod to the break and rod will flow into vee, thoroughly fusing the parts. R epeat operation until break is completely filled. Be sure to kick rod into weld to break down skin resistance as filler rod will lay on surface and will not fuse if only heat is applied .