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At some point does the soot actually become problematic? Like will it warm the rocket up more on the pad? Will it get too dirty and need a fresh coat of paint or a full wash down every so often? @elonmusk
Will BFR scorchmarks be as visible?
Do the scorch marks heavily wear thin the rocket body materials over a few uses? (Please excuse my lack of rocket engineering terminology) 
Have you tried a Mr. Clean Magic Eraser?
No, but an attempt with a Tide To-Go Stain Remover was made once
So how do you create the pinstripes then? Is that part repainted?
This is a great question
Flight proven battle marks.
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