Currently swapping belts on this Sony mech that had perished completely. Is this black goo a remnant of the belt that needs to be cleaned off or some kind of lubricant?

By A Mystery Man Writer

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I cleaned the head up, got rid of the rust but kept the patina

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I cleaned the head up, got rid of the rust but kept the patina. The original handle was reused, but thoroughly sandpapered. I burned the handle, sandpapered it again, and oiled it until it wouldn't soak up the linseed oil anymore. I gave it a leather wrap and a

I cleaned the head up, got rid of the rust but kept the patina

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I cleaned the head up, got rid of the rust but kept the patina

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