..is jeweler's rouge. Somewhere earlier, I posted that I'd found a set of four bars at Sears. The package recommendation is Tripoli for bone, plastics and similar materials, but I didn't have anything to experiment with besides the handles, so I went with the red, which I had used before. It can be used with a Dremel tool, and a buffing drum or felt point, a buffing wheel on a bench grinder, or on a rag, applied by hand and elbow grease. The mechanical applications should be used at slow speeds, with a very light touch as they can burn the surface, or, worse, can cut into the horn if too much pressure is applied. The Dremel will polish,but can leave "tracks" across the surface that must be rubbed out by hand afterward. I used the Dremel, and then finished off with a T-shirt patch and the red rouge, to get an even polish across the surface. If you've repaired cracks, this may involve going back over them to level out super glue seams, or laha that has seeped out around the edge of the butt cap or bolster. As you get the polish with the rouge, more of the little flaws will stand out but just need a bit more light sanding or steel wool, and elbow grease. Both the horn handles now have a finish that matches the magic stone finish on the blades.