that would look slick, but i warn thee: don't cover the holes.

those things get hot, and as someone who has replaced their fare share of logic and analog boards in all kinds of iMacs (and a capacitor discharge), those things get hot as all hell. my problem with those graphites were cooling (and logic board death after 3 years if you are like 30% of graphite owners). i'd drop a tint in there, or use a white paint and a template, and paint a really slick image that shows through. that would look nice too!
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MacBook 2GHz Intel Core 2 Duo w/ 2GB DDR2 RAM & 120GB SATA 5400RPM HDD
Canon Rebel XTI
Google Cr-48 Beta Laptop