Nope, I don't use aim... sorry. I wouldn't use it for the color map, I'd use the scales for a bump or displacement map. I'd use a another copy of what you have in a photoshop layer set to darken, and then paint your color texture on a layer beneath that. That way, your "crevasses" will be darker then the base color, and you'll also have them "deeper" as well. Kick up the specular for a "metallic" look, and if you have P5, also setup alt specular with the ansitropic node, for a very wet gloss look.

Way too many people take way too many things way too seriously.