I would be really cool if you did them in grey scale instead of trying to convert them to colour, including body paint in gret. *_* Well the vintage red lipstick she wears. lol
The Benny in black is a good choice with some straightening.
She has the classic Ariel band that defies gravity.
The bangs and the bottom need to be set in larger curlers (or over foam noodles) and heat set the wig with boiling water and let dry.
The bottom hair need to bet set with hairspray to hold the shape
Once that's done you need to style the bangs with teasing the root for volume and lift to the front hair line and set the roots with hairspray. Then sleeking the top layers over that and to the side.
For a wig this is what is go with.
Or these ones if your not concerned about the hairline.
In Grey (087)
I think Natural Black would work for her to give her colour definition.
I applaud your choice in costume.
By the way seeing Paperman made me excite as this is possibly the way Disney will do cell animation in the future.