Yes, you can restain red oak wood without sanding, but it requires some specific steps to ensure the new stain adheres properly. Here’s how you can do it: Clean the Surface: Use a degreaser or cleaner to remove any dirt, grease, or old finish residues. Lightly Scuff Sand: While you don’t need to sand off the old finish completely, lightly scuffing the surface with fine-grit sandpaper helps the new stain adhere better. Apply Gel Stain: Gel stains are particularly effective for staining over existing finishes without extensive sanding. Top Coat: After the stain has dried, apply a top coat to protect the new finish.