A while back I was at Loll Thompson's house and we played with her rusting powder. I used it to edge a couple of panels, and I still had one sitting in my UFO box. It was the perfect size for the stamp I used (teapot and sentiment all in one stamp), and also the rusty colour is the colour of tea (regular black tea at least!).
I stamped in Distress Oxide Vintage Photo (the new oxide inks stamp nice and sharp compared to the regular Distress inks), heat embossed, and then coloured in the teapot with a bit of the ink. I sponged a bit of regular Antique Linen around the stamping so it wasn't so stark white - I wanted quite a vintage look.
I mounted it on fun foam on a piece of text dp.
In case you're interested in how the rusting powder is used: you paint gesso around the edges of the cs, then sprinkle on the rusting powder, let the gesso dry, then spritz with vinegar, let it dry, and repeat the vinegar a couple more times. It streaks and runs just the way something does when it goes rusty. Quite a neat effect but it has a really horrid smell during the process!