Well, if you want a starship you have to do the -A2... Nah, just kidding!
Do you have any photos of the real thing?
So you have the one from AFV Club, right? That's a beauty of a kit, if a little complicated...
Now if you ask some more specific questions like how to do scratches like those? Or how do I make this part look dusty - I think I and other people can give you pointers.
I've been trying to expand on the interior AFV Club gives us - but the project got stuck for now - but I hope some fine day I will have that interior for a Patton...
If you want, here's my unfinished build of one, maybe you can get something out of it...:
http://cs.finescale.com/fsm/modeling_subjects/f/3/t/165990.aspx?sortorder=desc
Good luck with your build and have a nice day
Paweł