Brian, this may be a stupid question but, how are you doing the seams for the door and the hood (the outlines that define them)?

Also regarding the mud, I think it's a great start, though, for my eyes, it's a bit too even on the tires...some of the black should be showing through. Or, if the idea that the jeep has been driving through some extreme fresh mud (ala one of the jurassic islas after a monsoon), then the red rims should be completely muddy also).

Excellent modeling, though!