Painting it the same color might look ok on a darker colored car, but I wouldn't do it on a brighter color like Laser Red. Then again what do I know, I think body color mirrors look horrible on our cars.
If you just want to restore the factory color, try this. It's a million times better than Back to Black and won't wash off. http://www.duragloss.com/product.asp?pid=285
Im still thinking about skipping painting that piece, although I havent found anyone yet that hasnt complimented the painted mirrors.
RC