As a best practice, we leave items as-is which lets you, the buyer, decide whether you want to keep their timeworn patina.
But, many of these antiques have traveled a long way before they reach your home. And, they have passed through a variety of climates which can be tough on these older pieces. To help them on their journey, we always treat wood furniture with a mild cleanser and conditioner intended for antiques. And, we will clean glass with a gentle glass cleaner. We do not polish metal pieces.
If you have questions about which products are safe to use (on any of our antiques), we will gladly provide recommendations.