Shop jeweler's files and sanding supplies for smoothing rough edges, and preparing jewelry for that final polish. The finer grits of polishing papers, and ImpressArt's buffing block may even give you the final polish you're looking for.
If you work with multiple materials (such as Art Clay Silver and COPPRclay), your silver clay tools and work surfaces must be kept separate from the tools and surfaces used for COPPRclay or BRONZclay. The materials do not work well together, and you will get some unwanted results if you use the same tools and work surfaces for both types of materials.