I use an air hammer with a wide flat round - head punch, short bursts between the hub area and the screw holes after spray of pb plaster. I do this from the front of the rotor.

It came right off with the intense vibration. I clean the hub area up well with wire brush or 600 grit sandpaper to remove rust and put a very thin coating of high temp anti-sieze only on the rotor mating surface.

Good Luck

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Martineau Gauda
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96 C280 Mercedes
82 Rolls Royce Silver Spur