About 15 or so years ago I had quite a problem with alot of vibration in a part I was running on a VTL, an oldtimer gave me some brown clay type material he called "Bear s*it" I am now running a simular job with the same issues and I can not seem to find this stuff. I have no Idea what the real name of this is antivibration clay is, it held up well to coolant and stayed inplace very well after forming it,it was also re-useable.
John