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And here's the same mouthpiece after 30 minutes immersed in white malt vinegar. You can quite clearly see that the scale deposits have gone. What you can also see is that the mouthpiece has taken on a dull greenish hue. This is due to the action of the vinegar on the Ebonite that the mouthpiece is constructed of.
You will need to go over the floor several times to lightly scratch the surface. After the floor dries for about 30 minutes, damp mop using a solution of mild dishwashing liquid and water to remove remaining residue. Wipe up any water that puddles on the floor to prevent water damage to the wood.