I enjoy looking at various turntable forums, in particular those about vintage Thorens models. I bought my TD-166 MKII 37 years ago. A frequent topic of discussion on the forums is how to polish a tarnished Thorens platter rim. A lot of devotees want a mirror-like shine, which requires a grinding wheel. I don’t care for that look myself, and I’m happy with the results I get using fine steel wool.