As Tim mentioned...how much is it worth to me? I have a silver can. It was very pretty when I got it. I took the giant Meg sticker off and gum residue left behind acted as a particle collector. Ick. Now, after a few hard dives the can has scratches and residue. In the end, your can will get beat up, or someone else will beat it up for you.
I figure when it looks really daggy I'll send the can off to get anodized or get a Rhino- type coating. Maybe, I'll leave it ugly?