I have just finished my first batch of shells! I got these from surfside beach SC while they were doing beach rebuilding, some are from previous years but all from the same beach.
First I dipped them in acid for a bit until the outer layer of calcium comes off, then rinse in baking soda water. Later I put baby oil on them and let that soak in, then rinsed and dried them.
This is just my first batch, I have lots of very large ones to do next!
















