Oil of acid resistance

Oil of acid resistance was a magical unguent that rendered any cloth, skin, or other material it was applied to impervious to harm from acid.

Description
Each flask of oil of acid resistance was sufficient to cover the entire body and equipment of a human-sized creature. Alternatively, a flask contained enough doses to cover twenty-four human-sized creatures for an active period of one hour.

Powers
One application of this oil last for a period of twenty-four hours. However, any exposure to acid would diminish the period of potencyby a number of minutes equivalent to how much damage that exposure would have caused to exposed flesh. For example, if someone was exposed to the acid breath of a black dragon of great wyrm age the potency period would diminish by 1 hour and 4 minutes.

Components
Some wizards were known to use the dried webbing of greelox as an ingredient in making these oils. Other potential ingredients for making these oils included the secretions of stone puddings and the inner layer of flumph tentacles, with every twenty tentacles yielding a single serving of oil of acid resistance.