I finally got around to faux mercury glassing the pumpkin. I have to say that, not only does it look beautiful, it's stupidly easy! I found another great blog that had even better directions for using the leaf: Get Your Martha On The instructions have great photos that are simple to follow.
I used copper leaf instead of silver, so it's a little different, but here's how mine turned out: (it's really tough to photograph, but in person it's beautiful)
A word to the wise: if you've never used leaf before, it's hard to explain just how thin it is and how important a room without air movement is. It floats even without a breeze. It's also super important to keep your hands clean of the size or the leaf will stick to you and not the project.
Would I do it again?
Yep. I think it really resembles the real thing and if I had something else in the house to leaf, I'd already be working on it.