Purchase Zinsser® 12 oz Bulls Eye® Shellac Traditional Finish & Sealer Spray at Michaels. It is a shellac‑based sealer designed to give surfaces a natural‑looking, mid‑tone sheen that will not yellow or darken with age. It is recommended for use on a wide variety of interior surfaces, including wood, drywall, plaster, metal, masonry, and previously painted surfaces.