Cheers for all the useful suggestions. I'm going to try some delrin just to see if it helps. But will try the wax approach too. I think what has prompted this is the arrival of the rhodium Zetas from Dan. I noticed part of the bush pushes inside the brass tube which is something new for me. The simpler slimline bush hasnt been a problen to separate, but I was dreading getting CA on these bushes.
I'm still very much experimenting. I have some Craft Coat ordered to see what that is like. I am hoping to learn both techniques, wax finish as well as CA. Wax seems to look more natural but I expect is not as durable as a CA finish thats been polished.