I'm sure you're being sensible, but I'd treat carbon dust like I'd treat asbestos. It's really, really nasty stuff. A good way to stop dust getting into the air is to wet sand - if you're doing it dry and there's dust in the air you 100% need some kind of extraction.
No doubt just decimated the stems resale value but thats most of the clear coat and paint removed.
Got a lung full of carbon dust too no doubt.
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