i am absolutely loving that lower left corner, the text looks good but iron man's head needs a little more blending and i think that ironman's arm could be a little more in focus other small details that could be fixed, but don't really think matter nice work mate
you know now that I think about it...I like the color...lol It make me pal Iron Man look a little rusty...haha its only the blending
too many brushes ontop of the render,try going back and erasing some that is covering his face with a soft pixel eraser brush and that'll make it look 10x better. i really like everything else though,the text is great,nice job