I've bought a couple of used barrels now for my contender that have had weaver brand bases on them. I prefer the Warne weaver style bases on certain barrels that I swap scopes across using the warne QD rings.
Question is, the weaver brand bases that I have removed have some type of adhesive film under them that makes a mess of the barrel surface.
What is the best method of cleaning this stuff off without adversely affecting the blueing?