I accidentally bumped into this very powerful case mod recently, which basically means polishing your case until you get a mirror-like surface. At MetkuMods.net they have done an excellent job and in their article, ShinyShuttle with English Custom Polishing, we get to see how an anodized aluminum case is transformed to a shining mirror case.
The effect is actually very impressing and neat, in my opinion at least, and even if it can require a lot of work the result speaks for itself.
A very interesting mod for those who are bored with their anonymous cases or perhaps has some other metal product that could use a nice finish.
The entire article can be found at MetkuMods.net.