Thanks for the nice comments, gentlemen.
Bernard, I still can't figure out how I didn't screw it up, but the wheels are poseable.
George, after a long exhaustive search, I finally realized that Model Master Pacific Blue is a near perfect match for the engine color. I airbrushed it on and then hit it with semi-gloss clear. Also, the caps for the battery are painted with Model Master Russian interior green (its the color they use to paint the interior of Russian jets). When we bought the house three years ago and I was finally able to have my work area, I went a little nuts and ordered at least one bottle of every paint in the Model Master line (man, did I get in trouble with the wife for that!) Now, I just have to search through them all, and I'll almost always find a match for whatever color I'm looking for!