One of the top choices for jewelers when it comes to pickling solutions is Sparex #2. This sodium bisulfate liquid is most commonly used and comes in a granulated form that can be added to distilled water. While this solution is effective, it is important to note that it is toxic and can damage clothing upon contact. Additionally, the solution must be neutralized in baking soda before disposal. When working with this solution, copper tongs should be used to extract jewelry as other metal tongs may contaminate the pickle.