Though it seems this thread has ended up as a discussion of corrosion on ferrocium firestarters, and even though I am anticipating those replies, I would, however, like to remention the mirror issue before it gets "lost." It sounds like problems with the sparklite are more prevalent than the black streaks on the RescueFlash (from the PSP) mirror. Is there truth to that, or have more than the 2 people had black streaks? I place a high level of personal importance on the mirror issue because I carry the RescueFlash mirror as part of my "duty" gear afloat, and I just want to be sure that the gear will work when I need it to. The sea air has high humidity and I hope that it will not damage the tools I may need to survive, the mirror and ferro rod included.