I have 2 metallics - a pewter mini mini twiggy and an orange mini twiggy.
Both are still mint - no wear to speak off. I don't baby them especially, but neither do I use them everyday. I've found that they do take extra care. They aren't terribly puddly, but they aren't too stiff either.
I used to own a metallic pewter 2004. It's gorgeous, but I only take the bag out for a day & it's already rubbing off in the corner. I am very careful with my bags. I guess when I rest the bag on the chair, or table..it got rubbed off.