Here is a Bulldozer I did for a Military Friend…
i like the model, but the banner it’s not that good, maybe try to look for jpg texture online for the military camouflage.
Gimp can generate camo as well as I might recommend http://free-brushes.com/2008/11/20/gimp_flames_brushes.html for the flames.
Overall pretty good, but I agree, the banner is distracting and I think the flames could be a little more elegant.
EDIT: An example of the camo & flames can be seen here: