[SAJ]

Werner, wintergreen oil contains methyl salicylate. An ester of salicylic acid and methanol. It is a good wetting and creeping agent on metals, smells nice and is useful as an embrocation on the human body to relieve pain in tired muscles. It is related to aspirin (acetyl salicylic acid) in the way it works for muscular pain relief.
It also works in the vapor phase to soften hard rubber in articles like go-kart tyres, to give better grip for racing. Possibly made illegal now in the go kart racing fraternity
Is that too much information?
SAJ in NZ