Can you use bleach to clean antique furniture?

No, that is the worse thing to use. Use a good wood cleaner and it will shine it as it cleans.

For upholstery, you would want to get a professional to clean it. If the fabric is not historic, you can try cleaning it yourself--but not with bleach. There are other cleaners out there that are not as harsh. Plus, bleach tends to yellow over time.