So, transfer of electrons from paper to PVC by pressure only does not appear to happen.
Antinn, the grounded sweep are is still a very valuable device. It sweeps any incidental dust away from the stylus and discharge any static the record has collected for whatever reason. I have not had either a static or cleanliness problem in the 40 years I have been using one. It would have to be grounded anyway. If it were not just brushing the record might create static. I'll be taking my black light home for the weekend:)