Are you soaking it in plain old alcohol or a strong isopropyl alcohol? This may be why the paint is not coming off.

As for everything else, I suggest looking over some of the mods here to see what materials other people used on their iBooks.
MacBook 2GHz Intel Core 2 Duo w/ 2GB DDR2 RAM & 120GB SATA 5400RPM HDD
Canon Rebel XTI
Google Cr-48 Beta Laptop