Specifically molybdenum disulphide, sometimes called Molycoat. It is for lubrication on high load surfaces. -- Will On Sat, Jun 13, 2015 at 4:37 PM, Al Kossow <aek at bitsavers.org> wrote: > On 6/13/15 8:20 AM, Noel Chiappa wrote: >> >> what's the grey coating on >> them > > > molybdenum > >