Cleaning and polishing is usually accomplished with magical means, including various potions.
References from the canon
- Diluted Bundimun secretion is an ingredient of certain magical cleaning fluids (FB)
- Mrs. Scower's Magical Mess Remover
- use number twelve of dragons' blood is oven cleaner (SFC)
- When Ron had to polish awards in the trophy room, he came back into the dormitory smelling of metal polish because he had not been allowed to use magic for it (CS8)
- In preparation for the visit by the delegations from Durmstrang and Beauxbatons, the castle was spiffed up. Armour was polished and oiled so it didn't squeak when it moved. Some of the more dingy paintings were scrubbed so that their subjects sat with their faces pink from the effects (GF15)