I started my allergies with cocobolo, then ziricote, rosewoods, etc. If I didn't work with them, I was fine. Stabilized woods and walnut, cherry, maple, and other less oily woods were fine. I used other woods, especially blackwood, which I later learned was a sensitizer. A few months later, I used stabilized Curly Mango on 2 handles and hunted for a few days after I did the handles. One of those days was warm and I was sweating in my hunting clothes and later, had a itchy rash around my neck, armpits, elbows, behind my knees, etc (all areas where I often sweat). I thought I got into some poison ivy or something; took around a week to go away. I had used some butterscotch paper micarta for ferrules on the handles, but I noticed cracks in the butterscotch pieces, so I made 2 new handles with other ferrule material a couple weeks later. The next day, even without going hunting, I got the same rash. This time, along with the itches, when I got hot, sweaty or took a warm shower, my fingers and arms would puff up and feel tight and itchy and would go back to normal when I put cold water on those areas. I looked up the wood toxicity and learned about toxic woods, sensitizers and all of that stuff. Any dust set off a skin reaction, especially near where the respirator straps were or sweaty areas, or areas like my arms and hands that had the dust on them. I wore a respirator all of the time, so it was the dust on the skin that set it off. After that, even sanding a pine board and getting dust on my hand would start a reaction. I shut down my shop and sold off a lot of my wood and KMG grinder (Matt Parkinson from FiF bought it after they aired his episode!). Even going into my shed where I used to work and coming in contact with the dust a few years later would give me a mild reaction for a couple days (itchy and puffy arms/fingers/eyes). Now I can work with stabilized woods and ironwood, but I also rigged up a better dust collection system and shower immediately after working with wood handles.