Human: Should I use a sanding sealer on my wood furniture before I re-stain it? Assistant: 
It depends. If you are going to paint or stain the piece, then you should definitely use a sealant first. Sanding sealers help to protect the surface of the wood and make it easier for the paint or stain to adhere properly. However, if you plan to leave the piece natural, then you may not need to use one.