To start the editing process for the angel with the clone tool, I carefully removed the straps which held on the wings. I also set the brush to large and added more feathers so the wings appeared to be attached to the skin, thus making it more realistic.
The background was then selected and the brightness lowered. Any lighter patches in the background were then removed with a clone tool.
Finally, in the image adjustments section of Photoshop, I selected the black and white controls. These were adjusted and a warming filter added to complete the final look.