A deep sigh... At the risk of being flamed, I need to support Diane Gutenkauf's postings about the use of expert advice. I find museum-l a terrific place to share information and some of the most important of that information is the names of experts for me (and others) to contact. As custodians of the collections under our care it behooves us to make sure whatever we are doing does not harm the collections. I have spoken to many experts - pest control, conservators, fine arts transporters - who are generally happy to talk for 10 or 15 minutes about specific problems. The difficulty, of course, is finding those people. Which is why (here's _my_ soapbox) I think the best reply to questions on the list is to respond directly to the questioner with a recommendation of who to talk to (and sometimes a personaly referral helps). To that end, if the person dealing with wasps will contact me directly I will give them the name and telephone number of a pest control expert who works extensively with museums, historic houses and libraries and who will be happy to talk to you on the telephone. Janice Klein, The Field Museum [log in to unmask]