I've repaired a few laptop in my time and the one thing they all have in common is a lack of space, it is SERIOUSLY crowded in there. Add to that the awkward shapes of the internal heatsinks with all their heat pipes and I don't think this idea is viable.
However...........................
What I have seen is some seriously sexy work from people who have the talent to spray paint and detail laptops. One machine I repaired had a picture of Atlantis spray painted on the lid and then a few layers of hard varnish over the top. If you don't have the talent to do this then speak to a few students at your local art college and see if any of them would be interested in the work (students are always poor)
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Eccles