Best to work in certain metals that permit enameling in various degrees of effectiveness and limitations, copper, gold, sterling, certain types of steel, etc. Oxidation and firescale must be managed and controlled along the way, with special fluxes to reduce Oxidation. Edges and other areas...
Kevin, I used and applied melted glass crystals in this particular case, applied to thin copper foil. The technique is called enameling, and requires many firings in a hot kiln at about 1450 degrees. Many hours of work, editing, and refinement may be required, often too many to account, to...