If you're looking to remove Zinsser primer from wood, there are a few things you'll need to do. First, sand the area where the primer is with medium-grit sandpaper until the sheen is dulled and the area feels smooth. Next, use a product like Goof Off or similar to remove any residual primer. Finally, clean the area with mineral spirits or denatured alcohol and allow it to dry completely before painting or staining.