Oil of Preservation: Any nonliving, non-magical object may be coated with a layer of oil of preservation. If every surface of the object is covered, it will suffer no ill effects from the passage of time. Thus, wood will not rot, metal will not rust, and masonry will not crumble. The oil provides protection from both natural and magical aging.

One flask of oil of preservation will protect 1 cubic foot of surface area. The effects of the oil wear off after one century, at which time normal aging resumes.

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