please can someone tell me what sort of oil to soak a leather piston washer in,, its on the piston (it looks saveable) of an old HW35E,it dosent say "E" But it is an early EXPORT 22 INCH BARREL, Also the breach seal looks steel,is this normal,, and would a new type breach seal be OK, THIS GUN IS A MESS, but I am trying to save it,,it belongs to a mate of a mate, even got the irons fitted and correct stock. IT must be getting on a bit,"EGDAR BROTHERS LIVERPOOL) any other advice welcome,,thanks ANT.