Why does Rosalie always wear gloves in movie twilight?

Because in the making of Twilight, the actress who plays Rosalie cut her hands on the bowl she crushes when she meets Bella (It was filled with salad). It wasn't glass but a type of stunt plastic and the actress pushed too hard, hurting herself. Since a vampire couldn't cut themself with glass/plastic (or have those scars visible), they made the actress wear gloves.