J.K. Rowling is describing the effects of a sunny summer in Ron and Hermioneâs skin, to which we can suppose Hermione is tanned. Other passages of the seven-part novel talks about Hermioneâs cheeks going pink â which could lead again to a white skin.
Baking Soda. Using baking soda is another way to remove rust from metal. You can make a paste by mixing baking soda and water. Make sure that the solution is pasty enough to adhere to the surface, then spread it onto the metal and let it sit. After the rust is loose, you can scrub it off.
Use white vinegar. The vinegar reacts with the rust to dissolve it off of the metal. To use, soak the metal in white vinegar for a few hours and then scrub the rusty paste off. If the object is too big to soak directly in the white vinegar, pour a layer over the top and allow it time to set.