'[R-DEV wrote:Rhino']You are also going to get a lot of Zfighting around these parts here too since they are soo close together, here I would join them in the model with welded verts and have it all part of the same model to avoid any if your going to have a modelled cage thing, even thou slightly more polys far better than having zfighting ingame.

Now I'm not 100% sure on what would be the best way to do this, maybe some other modellers could chip in here but either you model it like you have so it comes out and it can avoid any Zfighting issues or you do it with a 2 sided plane using alpha textures and bump maps etc.
More potential zfight problems, since these faces are soo close together, behind these hatches etc, there is potential for the faces behind them to clip though etc, epically at a distance and if it dose will look like shit.

now I know Trahn mentioned your VN3 had a load of Zfighting problems on it and I can see a bunch that might happen on this model so here is some reading for you on zfighting:
Z-fighting - Wikipedia, the free encyclopedia
Avoiding Z-Fighting - GameDev.Net Discussion Forums
But ye, as mentioned in them, the best way to stop zfighting from happening is to simply not have faces close together like this. This can be done by simply adding a few extra polys to connect it all. A quick example I will do on these hatches etc.
Here I've just attached the separate objects, then deleted the old faces and welded them all up. Yes its crated a few extra polys but extra polys is FAR better than zfighting errors etc.

Now say if I delete this bit here on the front, you will notice there are no faces behind it that might be able to fight with it.

as you can see just an empty space where you can see the wheel behind it, this is what you should aim to do to have a good model, yes it takes much longer etc but its far better all round for good rendering, it helps with a lot more than just zfighting btw. Not all objects should be done this way and sometimes better off being a separate object for w/e reason but most of the time its best to do it like this.
All these objects too with perhaps the exception of the door frame but I would still do the door frame.
This side door will also have zfighting problems too, epically near the edges where it slants in, that will be a guaranteed zfighting problem there. The door on both sides btw needs fixing.
zfighting problems on these bits too:
zfighting going to happen on the hinge bits of these bits too:
these bits here too are going to have zfighting problems.
