I have mentioned the Intermuseum Conservation Association in the past. They have a website entitled the Art Materials Information and Education Network (AMIEN.org) that contains a number of forums touching on the material side of things. I plan to drop in from time to time as I have questions of my own. Note: they are having what appear to be spam issues and are taking no new registrations for now. But That will surely change for the better.
Jay,
This looks like a valuable resource — I’ve bookmarked it. The people in charge have formidable affiliations. I hope they can open it up again soon.
June:
The gentleman at AMIENS had me try to register again – without success. The saga continues.
Intermuseum is one of the top conservation associations and their opening a site for discussion is – or will be – terrific.