The cherub is too far forward, and is in a shaded area. If you move it back a bit into the light, the illumination on it will be more consistent with the rest of the image.

I agree with mossyB on the lighting on the cherub, but i do not think you should move it backward (or if you do, you should make it smaller). Proportions are OK at the spot it is now.
Otherwise, it is a nice idea, well executed.

Thanks for the comments!..I made a quick fix on the lighting just a tiny bit!
and I agree with u dustfinger moving the figure back to the middle,
its gonna make it so small...I've already tried that n did not like it..
but I will find someway to fix it..or give this another change on things.

Should have SBS, and IMO the angel could be moved back without scaling it down too much.
PS: There are better rust textures at http://www.cgtextures.com/