Here is what I suggest to make a more canon Fett. Get some Yellow Zinc Chromate paint. Use this to lessen the silver on the armor. What I mean is color in around the edges of the silver like this:
Next, dirty up the armor some more. Make the wheat symbol dirty by misting it with an airbrush or even putting a rust/black mix on your thumb and just rub it on there. The key is to make it look like it got dirty at the same rate that the rest of the armor did.
Add some red back to the gauntlets. Then dirty them up as well. R_Boba has a great tutorial on gauntlets here:
http://www.thedentedhelmet.com/showthread.php?t=8016
After all is said and done get some Dullcoat or even Krylon Crystal Clear Satin and dull the hard parts up.
Study pictures of Fett. Not only because of his stances but also for the details on the suit. I repainted several pieces of my armor because I didn't think they looked enough like the real thing.
BTW, I would love to see the freshly dirtied jumpsuit!
Here are a couple of classic Fett like poses that I use. You can never go wrong with the Jabba's Palace Fett stance IMO.