Very nice image. A pitty it is a bit overexposed, as the scene and atmosphere are very strong. Cleaning bas reliefs with a hard top.....;o) the two buckets create a nice enclosure for the subject.
Just a thought: Why not select a lower camera position, making better use of the perspective and the lines in the bas relief, zooming in on the man a bit more? It would pull this shot out of the ordinary, I think.