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Originally Posted by Chris T
element .... zoiks! How thin are hob plates? I was thinking they must be a couple of centimetres thick at least. I'm only thinking of skimming a millimetre off them, if that!
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You will never in a month of sundays take off 1mm with emery cloth. You will be extremely lucky even to take off 0.1mm and even then not evenly.
Emery is only good for removing loose surface rust. The grinding paste and oilstone method is better for getting rid of slightly deeper corrosion and keeping the surface truly flat but even that has its limits when you have deep pitting.