Well to start here's the rest of the photos to show the detail areas:
I used testors acrylics, which is what i use for everything, and the method to detail him was just drybrushing. I only did his grey areas, the parts that should be metal, and it was just basing those in black, then drybrushing silver over them to get the rough metal finish. Then gold was used to detail the little bits i wanted to bring out like the gears/springs etc just to break up the silver areas a bit.
I didn't do any paintwork to the truck body or flames, the only thing i did to the truck mode was the metal surfaces, grill, tanks, exhaust, and the little blue lights which i did with some blue pearl same for the ones on his chest and abdomen in bot mode. I also did some minor black washing and silver flashing (scratch look) on his bot mode car style parts which aren't part of the truck mode, but are meant to look like pieces of the truck just to bring out details there.
The thing was trying to get him detailed in bot mode, but keep him clean in truck mode like he is in the movie, its what i've done with all my movie TF's so far, need to do sideswipe and i'm anxious to get skids and mudflap.
Here's a little group pic with the autobots i have (minus jazz for obvious reasons)