I picked up a scute of a turtle shell on the beach (not UK, most likely a green turtle)) it must have been in the sea for a while as it has squiggly lines like something walked on/ate it. It is beautiful and I would love to preserve it. It curled up when it dried out but when I put it in a ziploc bag with water it ‘relaxed’ again. How do I go about preserving it? Should I polish it with some sort if wax or oil? It’s about as think as an Ikea kids’ plastic cup. Thanks x