>>6246437>>6246432Silver is ok-ish but a little weird. I imagine that missiles are painted for protection, camouflage and color coding. Some of them do have seeking heads of sorts, but I've never seen bare metal on missiles.
Of course, its all fiction here, and you're free to do as you please, but the combination of colors still looks little off. Its like mixing up your secondary and trim colors by accident. Would have been fine if the doors were black.
Anyway, if you're willing to work on it more, paint some nonsensical strips of black across the shroud of the cannons, and paint the armor plates of the body grey. If painting is not your jam, buy a box of cheapo pastels and do some "weathering" to help you break up the monotony, especially on the skin. Decals will also help a lot.
http://gunpla0079.blog.fc2.com/blog-entry-544.html 