I'm floored by the attention to detail from the headlights to the hubcaps to the metal on her face. Every section of the costume's armor looks carefully painted and aged and generally awesome. And look closely at how many pieces make up the elaborate helmet! If anyone knows who this cosplayer is, please let me know.
(This is the wrong time to admit that Transformers is a hole in my geek knowledge, isn't it?)
More photos over at EPBOT.