To keep the sheet steel floor of the track from rusting, every morning we had to brush on a coat of graphite “paint”. It was an impossibly messy job — get the least bit of the greasy silver ...

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Carbon, graphite and diamond materials include vitreous, amorphous, or glassy carbon; hexagonal and pyrolytic graphite (PG); and naturally-occurring and synthetic diamonds, diamond-like carbon (DLC) ...