I definitely use gloves when developing Pl/Pd prints, but I do not when coating the paper. The other exposure route is respitory by breathing in the dust generated during this process. I wear a dust mask when mixing potassium oxalate developer and ferric oxalate. Also, when drying the coated paper I open the door to the outside and blow over the paper with the hair dryer in that direction. I have heard and read about photographers suffering from long term health effects from breathing pl/pd dust over long periods of time. I would not be so concerned about chronic exposure from one workshop , but would consider additional safety steps when printing from now on.
Thomas