The Painting Process
First, it’s primed with a lead-based primer.
Next, it is painted with a metallic paint, in this case silver.
Then, it’s covered in a layer of shellac that is saturated with flakes of base metals. These metals that give it that Gilded Age look.
Finally, it’s installed, and painted again, in this case, to highlight the relief. It is the tarnishing of the metalic powers in the third layer that caused the Lincrusta to lose its gilded look.