Have you tried messing around with any image editing software? I've managed to salvage a number of similar images with minimal effort, just by using the automatic white-balance adjustment function in GIMP (which is pretty powerful and completely free, being open-source, if you're unfamiliar with it).
Another issue I'm seeing is with the depth of field. I assume you're using the macro function and keeping the camera quite close? My understanding of photography is far too rudimentary to attempt a proper explanation of the mechanics involved, but moving your camera back and zooming in/cropping the image should help get more of the model into focus. A distance of half an inch shouldn't render a part impossible to view, due to blur (granted, it can add flavor to pseudo-action shots, but it's not the best for showing off a build or paintjob).
As for lighting, it seems to be a case of "more is always better," so long as it's kept diffuse (reference: THE SUN
). Messing with camera settings and subsequent digital processing might be enough to avoid needing
more light, but having it won't hurt.