I'll bite and assume you are serious. It really depends on what you are trying to paint. I've always been a fan of the model masters paint because of the finer pigment and ease for airbrushing. These can also be easily brush painted. To closely resemble black and white you would want to use a gloss black and white. They are available in both bottle and spray can. http://www.angelfire.com/oh3/pmodels/mmfs.pdf
I guess I should have been more clearer. Really all I want to do is design some custom imperial troopers using various other helmets which is what I really want to paint. And so I'm just asking what type of black or white should I use.