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Care should be taken when using 100% solution of Oil of Wintergreen as it is toxic and it can enter the body through skin.

A quick web search will turn up much toxicity data. Here is one instance from Wikipedia:
30 ml (about 1 fl oz) of oil of wintergreen is equivalent to 55.7 g of aspirin, or about 171 adult aspirin tablets (US). This conversion illustrates the potency and potential toxicity of oil of wintergreen even in small quantities.

Dave

--- In TekScopes@..., DaveC wrote:
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> Thanks for that Mark. Another tool in the box.
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> Dave
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> Sent from my iPhone
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> On Feb 22, 2013, at 10:46 AM, "mark101234" wrote:
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> > I am not sure how many people are aware of Oil of Wintergreen penetrating properties, so I though I would point it out. Oil of wintergreen is very wet,it will creep into very close fits.
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> > I have used it to free up stuck set screws in knobs, a few drops down the hole and let it sit for an hour and the screw will come right out.
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> > Some pots when new had damping grease applied to the shaft/bushing area, as they age they become very difficult to turn. Two or three drops of Oil of Wintergreen in the shaft/bushing area and let it sit over night, positioned to let the oil run down the shaft and the pot will turn like new.
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> > Synthetic Oil of Wintergreen does not seem to work as well as the real stuff. The real stuff is not cheep, .5 fl.oz. is about $7.00. It can be had at Drug stores and good cooking stores. A bottle lasts me about 10 years.
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> > Oil of Wintergreen appears to be very inert I have not had it affect rubber or any plastics,unlike some commercial products. I am not sure about it's long term lubrication properties, it may be a good idea to follow it up with an oil.
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> > I hope this proves as useful to others as it has been to me, besides the gear smells nice afterward.
> > Mark Bradley K6TAF
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