Once I have the wires fired onto the first layer of glass, I may add foils to some of the spaces in the design. I use a graphite pencil to transfer the wire locations to tracing paper. I carefully trim away the traced line, creating a foils shape that fits neatly into the space. A drop of water draws the foil into position. Foils can be smooth or textured. I use a homeade brass plate and press the foil into it. This is the final form of the silver base, with engraving, wires and foils fired onto the base coat. Before you enamel, it is wise to do a value study. I keep my enamel colors displayed in clear glass jars. Scoop a little enamel into a small clear cup. The enamel must be thoroughly washed to remove fine particles. I wet-pack the damp enamel onto the piece with a small pointed brass tool. When the whole surface is covered, I dry and fire the piece directly on the heating element. After a few firings, the glass will begin to crack. Now is the time to apply enamel to the back. This is called counter-enamel, and cannot be avoided.