Apply a protective coating to your birch veneer if it's unfinished or dull. Sand the entire surface lightly, wipe off the dust with a microfiber cloth, and spray or brush with a wood lacquer. Allow the lacquer to dry overnight. Most veneer pieces are already finished; you can recognize finished veneer by its shiny and smooth appearance.
Polish the finished veneer to protect the lacquer, remove dirt and keep it shiny. Spray the polish on a clean soft cloth and rub the veneer in a circular motion. Fold the cloth over and buff the veneer with a dry section of the cloth.
Dust the polished veneer regularly with a static duster to prevent buildup.