How to polish the glass of a watch

Although more difficult to scratch than plexi crystals, mineral crystals also end up scratching. In today's video tutorial we will learn how to polish the mineral crystal of a watch, whatever state it is. For this we will only need 300, 600, 2000 sandpaper and cerium oxide powder. All these materials are very low cost and will allow us to restore the mineral crystal of any watch for very little money.
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