Ever After: A Cinderella Story : Danielle at the ball

When Leonardo Da Vinci made Danielle some wings to add to her mother's dress and shoes, shouldn't he have given her a mask to wear to the ball just to make sure that Rodmilla and Marguerite didn't recognize her?

The paint on her face was her mask. In a deleted line, Henry said "Is it really you?" and she responds "I've come disguised as myself." Additionally, Rodmilla and Marguerite would've recognized the dress and glass slippers anyway.

And how did Rodmilla and Marguerite recognize Danielle?

Because of the dress and the slippers.