Human: Should I use a sanding sealer on my wood furniture before I re-stain it? Assistant: 
It depends on the type of stain you plan to use and how long you want the finish to last. Sanding sealers are generally used for unfinished wood surfaces, so they may not be necessary if your furniture is already finished. However, if you want to extend the life of your finish, then using a sanding sealer might be beneficial.