I'm not sure he has been unmasked yet. :/ I certainly don't recall an instance.

@strafe_prower: @baddamdog: @ragdollpurps: @daredevil21134: can someone tell me why he pours drinks on his head ?

To tell it for sure one have to have three brains)

Always thought of him as either bald, or with a shaved head. Other than that, I've always pictured him with a chiseled jaw, jet black eyebrows, and with black iris'. Almost as a blank slate with perfect features, minus the hair. But also somewhat resembles Grant Morrison himself.