Based on all the pics I've seen of the SOG Flash (I don't have one), the clip looks more-or-less like a satin bead-blast finish. It reminds me of the bead-blast finish on many of Kershaw's blades. On their knives with black blades & clips, SOG does point out, on their own site, the clips are coated in TiNi (Titanium Nitride). Appears to be applied over the same satin/bead-blast finish.