Sanding Them Flush
After this is done to each natural key, we’ll sand the ebony using 60 grit paper glued to a flat block of MDF or another material you know to be flat. While the heads and tails are made out of the same material, from the same batch of stock, there is often a slight ridge at the head to tail joint. This is very annoying to the player so we’ll sand each key until the heads and tails are perfectly flush with each other.
