imho the picture is unfortunate ... it\'s way too close to capture the entire model and it shows abit too much of the right arm. the nmm looks very impressive, especially the gold at the back, but this is unfocussed. I\'d try taking the pics from a wider angle, and try not to let any part of the model stick out too much ( I know it\'s hard with this kind of model )
about the painting : the skin on the legs looks much better than the skin on the arms. I\'d try getting them to the same quality level. also the rock on the base might need a small highlight with white.
the eyes are impressive. this pic doesn\'t do the model justice I\'m afraid, because your technique looks pretty solid.