Some people have talked about trying to build an entire suit like new, but usually get talked out of it as it doesn't fit thematically as the pieces and parts seem cobbled together. It's not like he got the suit brand new and it started to show wear over time.
If you're using this for practice or as a jumping in point for Fett, you might be better off trying your hand at weathering. There are a ton of tutorials around here. You could try both topical and layered and see what you like. I surprised myself with how my lid turned out and I hadn't painted anything like this before.
This was/is my WIP thread
http://www.thedentedhelmet.com/f23/...ainting-something-wasnt-wall-pic-heavy-49182/
I say pick a helmet and try fully weathered. You might be happier with the result and it will make a cool display piece. In my opinion, it's going to look unfinished, but do whatever makes you happy.