I check what regs I could find. I found nothing about collecting or using turtle shells. It might be a big deal if I wanted to make a business selling them or something but, just making a call from an old shell I doubt will raise the ire of the mdc. This is my first attempt at making a call of this kind so I just scrubbed the shell with peroxide to get it nice and white. Then rustolem primer and brown, testors paint for the spots, and a rustolem clear coat. The slate is held in place with Jb weld. I got a 10cc syringe from work filled it with epoxy and then ran a bead around the edge. The final step will be sanding the slate and making a striker.