Ahhhh, I didn't think you were nuts, I just thought "Why is he doing an ad for Voyager!" LOL
I think it would look cool either way, and hadn't realized you primed the parts before putting the brass on, which the darker grey primer (as opposed to the lighter grey plastic) makes the brass pop.
Either way it will look cool, I just think that as good as it looks in primer grey and brass, it will look even better painted, and weathered.