hi
I havent stipped an airgun down since i used to do my Diana model 16 which was just after the ice age!!!!!
I bought a Boxer spring and new piston seal and breach washer and the washer behind the piston for my old BSA Mercury mk2
I actualy thought they has sent me the wrong piston washer as it wasnt leather!!!!!!!
so i stipped it down and put some wet an dry paper 1000 grade on a broom stick and sprayed WD40 in there and gently cleaned out the air chamber.
When i put i back together i nicked the O ring for the piston so i looked in my o ring box and found a near as dam it one and put it all back together but first washing out the air chamber with some WD 40 . And putting some down the barrel.
Eventualy got the bugger back together without any spring compresser and its superb.Quite a super little gun.
Now i dont understand why your all saying dont use this or clean with that if it works the old fashion way why change it????