Clothing is easier than body colour or shape. Zack has no idea why. It must be the way he's made. Clothing is meant to be changed. Physical appearance, not so much. Although people do change the length of their hair and fingernails, so Zack can at least do that.

"Uh-huh." His voice is muffled behind his hands, but can just about be heard. "Give it a bloody good try."

They can also apply make-up. Which is why he's attempting it. When Zack removes his hands, the marks are back. They may not be identical, but they were never exactly the same when he made them appear or disappear before. After all, one cant apply eyeshadow identically every time. This works on the same principle.

"Good enouigh?" he asks.