The buffing wheel can be extremely dangerous.  Most people who injure themselves just dont reaiize that they need to be used with caution.  I would try a combination of the methods suggested... Do the lower case components seperated, but do the LCD case intact... just find a safe way to cover the lcd (like a sheet of styrene cut to size) and tuck the wires safely away... or hand buff the top of the case.  Maybe the best test would be on a damaged case from ebay, to see how well it buffs. 
>Mac mini PPC / 1.42 Ghz / 1GB RAM / 74.41GB 4200rpm 2.5" / Airport + Bluetooth / 10.4.7 / 20.1" LG widescreen
>G4 400 PPC / 20 gig / 768MB RAM / ZIP drive / 10.4.7 /17" apple SD / Back up system
>Powerbook Titanium 1Ghz / 40GB / 512MB RAM / mashed up and waiting for a good mod!
>Macintosh SE/30