Gall's work is lost wax cast into bronze, aluminum or stainless steel or welded Cor-ten-steel. The original sculpture is either welded or formed with wax or clay. A mold is then made. Hot wax is poured into the mold. The waxes are detailed and sent to a foundry for casting into metal. Most of his sculptures are comprised os many separate components that are assembled in either the wax or metal stage. Many of the larger works are produced in editions of seven or ten while the smaller pieces are one of a kind in that each one is assembled individually. While a concept may be repeated many times each sculpture is unique.