Its been a while since I had the SA-35 to the range due to a surgery. I ordered a set of XS sights for it so I got it out of the safe to get it ready. On the end of the barrel was this white corrosive looking stuff. I cleaned the powdery stuff off with Hoppes. I assume it is some sort of adhesive that Springfield used to adhere the barrel bushing since it in non-removable. Anyone seen anything like this before?