My 11 year old daughter wanted to be a Weeping Angel for Halloween. What could be scarier? I didn't want to have to do any sewing, and wanted it to be as cheap and easy as possible. We weren't too concerned with absolute stone-like accuracy, more with BEING JUST AMAZINGLY FREAKINGLY TERRIFYING AND AWESOME COOL.

The costume had to be warm, because it often snows in Colorado on Halloween. And we didn't want to have to paint too much of her body, because of the expense of the paint and because it gets itchy.

We started with a second hand choir robe as the base. Angel wings and werewolf teeth from a costume shop. Krylon "make it stone" paint in "black granite" (grey for the robe) and "obsidian" (black for the wings).

Step 1: Painting the Costume

I made a rough sash out of a piece of black satin fabric we had lying around. Then we painted the robe and sash with the black granite "Make it Stone" spray paint.

Step 2: Face Paint and Under Layer

To minimize body paint and keep her warm, we got a grey turtle neck, gloves, and tights from Target.

I ordered Palmer face paint in black and white online, and applied with make-up sponges and a pastry brush. The pastry brush was GREAT for painting the hair. Highly recommend that.

We mixed a base grey, then sponged bits of black over her face and outlined her eyes with black eye liner. Even I was surprised at how well the effect worked.

Step 3: "Blink"

I ended up having to do some sewing. The straps on the wings were too long for her, so I shortened those. And I sewed the wings to the robe in an attempt (with minimal success) to keep them up higher on her back. We tried stapling first. This did not work. :D
You may want to add some sort of rigid structure with a coat hanger or something, if you care. But as you can see, once she had it all on the effect was great! Good enough to scare everyone in the neighborhood.

Happy Halloween!