Note: Silk "Oak" (Grevillea robust) isn't.
http://www.na.fs.fed.us/spfo/pubs/si...ea/robusta.htm

Quercus spp (Oaks)are loaded with tannins, but not otherwise nasty.

"Bruce Ferguson" wrote in message
...
When ever I hear about turning oak I always throw this in for what it is
worth. I have never had a problem with oak trees. I have been around
them
all my life. Here is the but. I was in a class and started turning Silk
oak. I was in short sleves and shorts. I turned the bowl and used the
restroom in the middle of it all. Next morning I had broken out with
poison
oak.