Face Erase
When someone’s face turns black from being slapped with a whiteboard eraser, like it was a face-painting gone wrong and the paint was just plain mean.
He got slapped with a whiteboard eraser, now his face looks like a charcoal drawing.
She got hit so hard her face turned black, like she got hit with a crayon and a paintbrush.
His face turned black from an eraser slap, like it was the worst art class ever.