Hi there, I wonder if anyone can help. I've made about 100 PMC fingerprint charms for Christmas orders and haven't been doing it for very long. My pieces turn out beautifully, however, most of them have light scratches all over them even after vigorous polishing. Whatever I try I just can't get of them! It seems to be happening at the dry clay stage when I sand them down. I use sanding pads around the edges and over the surfaces (bar the fingerprint and engraving) - I think this is what's causing it because I can see the scratches on the surface after I've sanded. Its definitely not my burnisher. The only other thing it could possibly be is either the soft brass brush which I use on the piece after firing, or its happening in the polishing process (I use the graded polishing papers) but I can't see it somehow.

What should I be using to sand the dry PMC? Has anyone else experienced this.