Spray paint will do the trick. :)
spray paint or silver leaf
Spray paint. Lightly scuff up the surface with a green kitchen scrubby or 220 grit sandpaper. Several light coats will give you a smooth finish.
spray paint or just paint in a small bottle available at an art supply store.
Lightly sand and then use silver paint.
You can spray paint it. I would remove the glass and picture. Then clean with denatured alcohol and spray paint.