I toned down the exhaust stain. It is still way heavier than anything in the photos we see. OP, you want it barely visible or take some artistic license?
Still working on the nose art. I am experimenting with the spec map to determine the best reflectivity for the yellow, particularly the tail. Flatter seems to look better so may press that direction (as someone mentioned the yellow on the tail looks flat in the photos).
What else? A little cleanup on the base layer to correct color errors.... A final run through on the spec and bump maps after I fix the nose art, exhaust, and the tail and we will be good to go. The data under the windshield may also need to be increased in size. Hard to be sure though...
(OH! Gotta' work on the spinner per Dragon Tamer's suggestion.)