Right, we weren't into Analysis in those days, we were just trying to get rid of the symptom, get the pulsing, juddering to stop, and get the car safe again for "Mom, or Grandma" and move on to the next customer.
In hindsight it probably was Cementite but no one knew anything about that in my circle of friends, we either replaced the rotor if too thin, or we turned it, and if the pads were over 1/2 gone, we changed them too, and 99% of the time we never heard from that person again.
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