oddly enough, try one of your local hobby shops. Those tiny cans of paint are laquer, and run about $7-8 a can. 2 cans will do an entire guitar body if you are frugal.
So you want metallic green or green with glitter in it? If you just want metallic green pain go to an auto parts store and look at what they got. The "cayman green" paint I used on my bronco is metallic, they have a couple lighter color greens that are metallic I think.
im thinking he wants more of a green metallic that is extra metallic.
its another guitar for someone, ima do it at school, its gonna be a dot studio style guitar, just green all over the place instead of black like the one he has,
i think it should look alright, i hope.