* Fine sandpaper
* A piano key finishing kit
* A soft cloth
* Warm water
Step 2: Sand the black keys.
* Use the fine sandpaper to lightly sand the black keys in the direction of the grain.
* Be careful not to sand too much, as this can damage the keys.
Step 3: Apply the key finishing kit.
* Follow the instructions on the key finishing kit to apply it to the black keys.
* Be sure to apply the kit evenly and let it dry completely before moving on to the next step.
Step 4: Buff the black keys.
* Use the soft cloth to buff the black keys in the direction of the grain.
* This will help to remove any excess key finishing kit and give the keys a polished finish.
Step 5: Clean the black keys.
* Dampen the soft cloth with warm water and wipe the black keys to remove any dust or dirt.
* Be sure to dry the keys completely before playing the piano.
Your piano's black keys will now be refinished and looking like new!