Watch this instructional metalsmithing video to weld a set of figurines out of sheet metal, nails, and a coat hanger. Oxy-acetylene welding is the only gas flame type of welding that is hot enough to melt all commercial metals. Use 22 gauge sheet metal to make clean and safe metalwork. Use a plasma cutter to quickly cut out the basic pieces. You can also use a blacksmithing hammer to bend the metal into unique props fpr your metal figurines.