Recently, I did a blog post about the restoration of the stained-glass transom windows in the sewing room.
While the stained-glass panels were restored, their wood sashes also needed to be restored. This meant removing the many layers of old shellac on the inside, and sanding the outside down to bare wood. Then, the stained-glass panels were re-set in the sashes, and glazed. After the glazing dried, the outside was painted with an oil-based primer, and two coats of black oil-based paint.