John, I am the same way. It started with Cocobolo, then went to Bocote, Rosewoods, Ziricote and got really bad when I worked with stabilized Curly Mango and forced me to stop doing knifemaking several years ago (I didn't want to only be able to use synthetics). I would break out anywhere the skin was exposed to the dust, even areas that my hands touched when they were dusty, or where sweat carried the dust too. Hot water would make it puff up horribly, cold water would return it to almost normal, but still slightly swollen. To this day, I cannot work with non stabilized woods anymore due to getting a rash where the dust settles, despite wearing a respirator. It's been almost 7 years after the reactions got really bad. African Blackwood is a sensitizer as well and over times, makes you more sensitive to woods that you were fine with before, too, so its a double whammy.
Oddly enough, I can work with stabilized woods again where before, I would get the same reaction as working non stablized woods. I save the woodworking for the last part of the shop time and then jump in the shower immediately and wash off thoroughly.
