The painting made me rethink this old mirror, which I bought at an estate sale for my first college apartment (gulp!--more than a decade ago). Anyway, C and I have never really loved the gilded frame, and the new paint color (smoky purpley gray) just wasn't playing nicely with the gold. So, I decided to paint it matte black.
This thing is a massive sandwich of glass, backing board etc. so I just masked off the mirror with painter's tape.
If you want to spray paint, I highly recommend sandable automotive primer. It's much easier to work with than spray enamel (doesn't drip as easily, dries fast) and you can sand between coats for a super flawless finish. Here's our mirror after a couple of coats of black primer.
Peel off the tape...
And voila!