About 10 years ago I cut down a persimmon tree by mistake on some land I own. I brought several blocks to the house, sawed them into short boards, and stuck them under my work bench where they were forgotten. Several days ago I took a piece out and found they looked pretty good. I'd like to make some handle slabs out of some of it but I have some concerns that it's maybe too soft to withstand getting wet, wear and tear etc. I have no experience stabilizing wood. Does that actually strengthen it or just preserve it and what kind works best?