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    Ouch. Well, if the grit and sand wouldn't have...

    Ouch.
    Well, if the grit and sand wouldn't have destroyed your blade, the heat probably would have.
    Stay below 10000 and the heat will dissipate fast enough not to be an issue if you don't hold it...
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    1,982

    What was the RPM? If I use polishing compound, I...

    What was the RPM?
    If I use polishing compound, I never go above 12000 RPM because anything faster will heat up the steel so fast it'll lose its temper. lower than 10000 is generally better I find....
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