I only worked with these two woods today...and no synthetics, and I got a rash on my neck. It has happened before, but I wasn't able to single anything out as I had worked with too many woods on those days...plus glass and phenolic.
Today though, these were the only two woods I messed with. Of course I realize everyone is different so it could be either, or even both, but I thought I would ask which causes more issues.