Shucks, if you do not abuse your lens by exposing it to outre climatic conditions, outgassing of wheel-bearing grease is not an issue. I rebuilt the 2.8/18cm CZJ Sonnar T I use on my Hasselblad 2000 FCM (special adapter) in 1995, and I just checked it -- no problems at all, and the glass is clean as clean can reasonably be.
As to Compur lubricants, the consensus from the Compur experts on the Rollei List is that Compur shutters ought to run as dry as they can -- if you shoot firearms, think of that sort of lubrication, just the slightest and lightest oil possible, with a dollop of grease on the actual gears. Watchmaker's oil -- you can find this at most watch repair stores and gun stores have a close equivalent; in a pinch, 3-in-1 might do -- and some light silicone grease for the gearing. I am sorry that I cannot be more specific, as none of the guys who responded could give me details on the grease, other than to use it VERY sparingly and carefully.
If you wish, contact me by a private message, and I will put you in touch with the guys who responded: a couple of these folks have overhauled Compur shutters regularly. The one preliminary seems to be to remove the shutter asembly and to have it cleaned, in an ultrasonic liquid-bath cleaner, if possible.
Marc
