You're Not parinoid (they are looking at me way too!). My wife is actually a glass artist and she uses silicone carbide to grind and polish her glass. Actually we have a equipment termed a flat lap which is a sizable metal plate that spins though water and carbide grit http://cristianoojs975.wpsuo.com/the-worst-videos-of-all-time-about-silicon-carbide-crystal-structure