I’ve read some worries that in 9.0, the HD models will not be customizable. Well, as far as I can tell, that’s not true. Check this out: Russian player Foxerfit already produced a re-colored HD skin for the Tiger I 9.0 test model:
On the left, the recolored one. Obviously, it’s pointless to give links for a model, that’s not done yet (it’s likely it will change before the patch goes live), but as you can see, it’s possible.