Brasso is pretty abrasive. After all, it's designed to polish brass. You're talking about a piano-finished plastic casing on the Fuze. I would think it would add more scratches than it removes.
Depending on the severity of the scratches, you could maybe try some regular ol' toothpaste (not gel). It has a light to mild abrasive in it but not matter what you try, you have to realize there is no such thing as a scratch remover. All anything can do is add more finer scratches so the bigger ones don't show up as much.
Since it's been a while siince you posted this with no response, you may already have your protective plastic case and screen protector on it by now. My guess is unless the scratches you're talking about are large and deep, you probably won't be able to see them that well. I would wait and see before possibly scratching it further.
Last edited by Tapeworm; 04-23-2012 at 06:08 PM.