A couple of years ago I got some Turkish shadow puppets. They are camel hide, with (probably) natural vegetable dyes. At the time of purchase, I was told to put oil on them to extend the life of the puppet, so to speak. The trouble is, I don't know what type of oil is best for this job, and I don't want to spoil the puppets with something that will go rancid, or who knows what. So what should I use? Olive, mineral, mink, neat'sfoot? I tried asking on a puppeteers website, but my terminal kept getting kabollixed up.