I’d love to have one of these-unfortunately, I haven’t seen one in years. it was a device for re-surfacing auto wiper blades-it looked a bit like a glass cutter-you stroked it over the blade, and it would cut away a thin layer of oxydized/hardened rubber-and restore your wipers to new condition. Very useful-but I don’t know what happened to them! :smack:
Why not just try some sandpaper or even some random rough surface, like concrete?
You could get some acetone from the hardware store. That’ll dissolve the hard rubber and expose a fresh surface. CAUTION: use it sparingly and be VERY careful, because it’ll also dissolve and/or ruin the finish of ANY paint, plastic, rubber or similar substances like lineolum it comes into contact with.