Apply silver overlay paste. Using a fine-tip paintbrush, apply a very thin coat of Art Clay Silver Overlay paste to the portions of your jewelry piece that will be gold [PHOTO 1]. Allow the paste to dry completely.
Apply gold paste. Using a clean fine-tip paintbrush, apply a thin coat of Art Clay Gold Paste or PMC Aura 22 paste over the dried silver overlay paste [PHOTO 2]. Allow the gold paste to dry completely. Apply a second thin coat of the gold paste, and allow it to dry completely.
NOTE: Don’t apply the gold paste too thickly or it could chip or peel off.
Sinter the paste. Place the painted piece gold-side up on a soldering surface. Using a butane torch in a sweeping motion, heat the entire jewelry piece, directing the heat mostly toward the gold portions.
You’ll know that the paste is approaching sintering temperature when the silver turns a light salmon-pink and the gold turns a brighter orange [PHOTO 3]. As soon as the gold is glowing, remove the heat; there is no need to hold this temperature.
NOTE: The gold may look uneven, thin, discolored, or even appear “peeled back” in spots at this point [PHOTO 4]. Don’t worry; it will look great after it’s burnished.
Burnish the gold. While the piece is still warm, use a pair of bentnose tweezers to steady it. Using a ball-tip agate burnisher, carefully and firmly rub the gold [PHOTO 5], adhering it securely to the silver.
NOTE: While you can use other types of burnishers, I find the ball-tip shape lets me get into detailed areas more effectively.
Brush the gold with a brass brush. Once the piece has completely cooled, use a soft brass brush and soapy water to brush the whole piece, including the gold areas [PHOTO 6]. This will complete the process of burnishing the gold. If your gold is sintered with the silver overlay paste completely, you will not remove the gold with the brush.