This is pretty damn awesome, I'm loving it. Only 2 things I have to say. The lower lip looks off - you may have been aiming for that, so I'm not going to say anymore about it.
Also, If it were slightly tattered, I think that would match the 'Joker' style a bit more. Overall, good.
Arg, sorry. Meant to give it a 9, but there is no model (being a spray), so I put a question mark there, hoping it would negate that part of the rating. Instead, it just set that ranking to a 0. I'll just give it a 10.