Letter 16000 Polishing the insides of clam shells [Florida]  ++ Clam shells from a river bed in northern Minnesota. I don't have but six pair but with beautiful insides of purple and wavy white. I would like to know how to polish them. Cynthia Bastien - Jacksonville, Florida December 27, 2006 I ALSO HAVE CLAM SHELLS AND WOULD LIKE TO KNOW HOW TO POLISH THEM. Gregory DrowningBear - Park Hill, OK, U.S. Dear Reader: please choose what you want to do. I want to post a question or inquiry of my own.   I want to answer or follow-up on this question publicly (in non-commercial fashion).