Originally Posted by Firefighter
Not that it should happen but aren't the HP+ a metallic pad? I mean metal on metal at racing speeds. It stands to reason this could happen. IDK though.
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That was a thought the mechanic and I had after finding nothing twice. Tell the corner workers it's normal and don't worry about it. We were wondering if the airflow from the cooling would blow hot metal particles from the rotors and pads under heavy braking out where it was visible. Does seem strange though. The corner workers see a lot of cars running on the track and this must have been something they don't normally see.