If you are ever cleaning chalk painted furniture, it is important to use a mild detergent and water. The first step is to clean the surface of the furniture with a mild detergent and water. Be sure to dry the furniture before beginning to clean it. Next, use a bucket and bucket of water to clean each area of the furniture. Be sure not to get any on the paint or on your hands. Finally, use a vacuum cleaner and bucket to clean all of the dirt and debris from the furniture.