• For anyone who was interested, I tried the technique with the rotating coat hanger/steel wool, couldn't really get it to work at all. I think my dremel just has nowhere near enough torque. Others might have more luck with it. Went at it with a round file instead as it was pretty rusty in there.

  • Either not able to spin at all (which I think is probably very bad for the motor), too slow, or not enough pressure to actually do any damage.

    Like I say I think it might be alright with a drill perhaps. My dremel was £20 or something stupid.

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