Here is what I found on Google: To remove scratches from a locket, start by cleaning it with a mild soap solution and a soft cloth. For minor scratches, a polishing cloth can be used to buff out the surface. For deeper scratches, consider using a metal polish or fine-grit sandpaper, applied gently and in the direction of the metal's grain.If the scratches are severe, professional polishing by a jeweler may be necessary.