It is a chemical reaction between the shell and acid.    It shows up in
a white powder form and eventually deterioriates your shells.  It also
spreads from one shell to another in time.

[log in to unmask] wrote:

> What is Bynes Disease and What do I look for to if it's present?
>
> Kevin Kutolowski
> Hiram, OH

--
Jim and Bobbi Cordy
of Merritt Island, Florida.

Jim Specializes in Self-Collected
Caribbean & Florida Shells

Bobbi in Shell Creations