Below, the window is rinsed in the sink.
Here, I'm brushing all of the solder lines, both the old and the new, with black Novacan patina. After the lead lines are done, I applied patina to the metal frame. Then, I turned the piece over again and applied patina to the entire back side and the frame, followed by rinsing in cool water.
After the patina is dry, I applied Stained Glass Finishing Compound, which is a light carnauba wax, to both sides of the window and frame. This brings out the shine of the glass and the solder and protects them. It won't need any further attention other than an occasional dusting.