Do not use black patina on the lead/solder lines on your finished work if there is any painted glass leaded or foiled into the panel. This relates to traditional painting on glass, using vitreous paints, fired at ca. 670C (1245F).
When using enamels within the painting, do not let any patina come in contact with the finished production. The patina will bleach out all the enamel colour. The patina will etch off the outer layer, either removing the shiny top layer of paint, or the delicate lines of detail work altogether. Copper patina takes a little of the paint off, but not nearly as badly as the black.
Instead, brush the panel with a natural bristle brush used for putty clean up, and polish.
Silver stains that have been properly held at the maturing temp, should withstand any patina application, as they have become "part of" the glass.