Instructions
Clean a Dead Seashell
Pull off any algae with your fingers. Soak the shells in a solution of half water and half bleach. You can soak a lot of shells at one time. When the periostracum (a flaky leathery covering of a shell) comes off, take the shells out.
Pour out the liquid and rinse the shells with fresh water. Be sure and wear rubber gloves until the shells are thoroughly clean. As you rinse each shell, rub off any sand or residue with a towel or your fingers.
Use a small pick to scrape off any barnacles from the shell. You can also use a common grill brush, or a toothbrush to clean the shell.
Buff or shine the shell. To get a good shimmer, smooth over the shell with a soft towel or tissue moistened with mineral or baby oil.
Purchase "Shells of the Atlantic and Gulf Coasts and the West Indies" by R. Tucker Abbott, available at the Barnes and Noble website, for more helpful tips (see Resources below).