What is diamond polishing compound?
Imagine you want to make a dull rock shiny and smooth. You might rub it with sandpaper.
Diamond polishing is like that, but it uses tiny, tiny bits of real diamond instead of sand.
Why Diamonds? Diamonds are one of the hardest things on Earth. Because they are so hard, they can scratch and smooth almost any other material.
What is Polishing Compound? You can't just rub a big diamond on something. Instead, the diamond bits are mixed into a paste or a liquid. This mixture is called a compound.
Think of it like super-powerful, liquid sandpaper.