Sanding the surface before restaining a deck can significantly impact the final result. It helps remove old finishes, smooths out rough spots, and allows the new stain to adhere better. However, the decision to sand depends on the current condition of your deck and the type of stain you plan to use. Factors like wood type, previous treatments, and weather exposure can all influence your approach. If you're unsure about the best method for your specific situation, ask Improvi.ai for personalized guidance on preparing your deck for a fresh look!