Hello, I have a Hog Hunter in 308, I removed the iron sights for the sake on the scope I mounted. there is some kind of adhesive under the mounts & I actually had to tap them with a small hammer to break them loose from the barrel after the screws were remover. Has anyone ran into this too & if so, how do I remove the dried & crusty stuff from my barrel without ruining the finnish? Thank you for any information. Engineer0708