I am making my first knife, from a Russell Green River blank I bought. I have filed a guard, and will silver solder it on at some point, probably after mock results this week. In preparation. I have been looking into handle wood types, and have decided to use something from my garden, so it has some meaning to me. I have selected a piece of Magnolia, from a tree I used to play in, but have come across a problem. When I cut the piece of branch in half lengthways, a good friend of mine pointed out that the wood was cracking. He has informed me that this is due to the wood drying at different rates, and would probably carry on. I was wondering whether anyone could tell me how to solve this problem, and how to stop pieces of wood cracking in the future. Also, I was wondering whether if I varnished it directly after shaping, that would stop the moisture loss?