Good effort so far man, i like the guys suit and your mckellen is not a bad likeness. :thumbup: IMO Your spec maps and diffuse maps seem too similar so i think you should develop them in tandem. The diffuse needs to be flatter, darker? The scratches seem to be in the indented areas? how so? The edges get batterings…
Right now it looks like you just photo sourced the textures and slapped them on. Try baking out an AO map to get some lighing in there or else it looks flat. Suggest looking at Racer's painting metal tutorial and the other tuts he has on his site. Also look at some references for natural damage like rust etc.
The diffuse is complete, I'd appreciate any critique on it, so far I've created a normal, AO and glow map, all I've left to create now is the specular. Does anyone have any good advice or tips for creating one inside Photoshop? Any good links to tutorials are appreciated as well, couldn't find any thing good myself, thanks