You know; adhesives have come a long way. I particularly like the Loctite(Henkel) products for specific applications. In short I have learned that color has no real implication on application and there are retainers and also thread lockers. Henkel has a nice application guide(spec sheet) with each product that tells technical specifics about the particular product, which I encourage reading thereof.
That small pin has some reputation huh?.....
Some are the berries to remove from their interference fit or years of being; I am not in direct favor of Loctite application in this senerio; jmo. You might be bumped off your gunsmith's Christmas list. Some things I can say about Loctite products, use the right one and if has to be removed most of the time is heat and duress. Never know when a Thor job might be in the future.
The G.T. has some wisdom in his application of properly applied hammering, guess tapping with a nice flat faced hammer on a steel straight surface. There is a limit to such, and some cosmetics in a slightly flattened viewable surface sometimes. Kinda like, but different, to a hammer stroke to restore existing barrel timing or dovetail fitments. A little bashing goes a long ways.
A precision fitted pin in said hole, is just that; a precision fit. If the hole is out of round for whatever reason, the replacement pin you paid big bucks for, is going to suffer the same fate.
So one could ponder using a straight chucking reamer in the appropriate machine, to enlarge the hole upwards in size. Talking a small upgrade to diameter. Gage pins are relatively available in at least 0.0001" diameters, so with the Machinist Handbook on fits........yes, I read a little in that book on occasion and still not up to G.T.'s level of expertise.
Someday, that pin will have to come out; it was designed that way really.
Every owner eventually faces these things and to each their own.
Just some pondering on how to possibles.
Rick W.