I picked up this mirror about seven years ago, and never got around to doing anything with (yeah, same old story). Frankly, it wasn't valuable or attractive enough to warrant my attention. But as part of my resolution to deal with the unfinished project pile, I took it out for re-evaluation.
The outer border was interesting, with its all-over composition ornament resembling woven netting. There were a number of areas of damage, particularly at the edges where this was most vulnerable. It was also covered in the traditional "gold" radiator paint, and with a somewhat charming, but inappropriate painted panel in the upper section.
Rather than invest a lot of time and materials, I opted for a more decorative solution. The low value did not warrant using karat gold leaf, and an all-over gilding seemed like it would be too over-the-top.
I used composition gold on the mirror lips and composition ornament adjacent. I then began building up my painted surface, A gray/green was the basis, followed by a violet-tinged gray. This was followed by a glazing of sienna, followed by a wax/rottenstone treatment.
The final effect is subtle, yet rich, particularly when the inner applique with its original, though worn gilding as put back. Once mirror plates are installed we are done!