Not only greasy but in some parts inside the shed there were metal shavings from turning wheels ( I suppose) which played havoc to my flip flops.
Photo Balkanmodels: August 1986 at the Engine Shed Thessaloniki. Loco MLW A501 has moved out of its stall and lining up for sand. Fumes, noise and a vast sea of orange and blue locomotives with a little green tinge. If there was a paradise then it would have looked like this

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christo