I have read in the recent past that Neatsfoot is ideal for leather piston washers and the like. I purchased some and have serviced various air rifles and pistols since then using it(where applicable). My concern is that I have since read that Neatsfoot as we know it today is not as pure as it once was and contains water. If this is the case do I have any concern in regards to internal rusting of the cylinder? Does the water evaporate off? I love a good tinker but I don't exactly relish trying to remember which of my collection I've rebuilt since purchasing it or infact the possibility of having to replace 'contaminated' washers.
Although I have a regular plink due to the number of air rifles and pistols I have some don't get touched for a while so the actions won't be being cycled if this makes any difference. Atb,Phil