I bought an unprepped, slightly damaged Breviceps trilobite from HoldingHistory recently to see if I can actually prep something. No air pen, no air abrasives, no real tools at all. Just some needles, pin vices, dental picks, an old nylon cleaning brush from an electric razor & some hydrogen peroxide. Many hours later, I have gotten it to this. I may try to get the last little bits of matrix out of the crevices at some point, but for now I'm pretty happy with my first real attempt. 2 pics showing before, the rest current. Not too terribly bad, is it?