how to bring back the shine to a conch shell

[shellseller]

As stated the shine loss is permenant. You can just use a clear glossy spray enamel. I pick mine up at Home Depot for under $4. Like stated before make sure you remove all oils first. I would wash it down with soap and water first and make sure that it is completely dry. This will ruin the specimen status but at least it will maintain it's shine. The soaking to remove the animal was right and it can take that long but you have to change the water almost every day so that you don't ruin your shine.