Karl, since you are shooting it :-) You may try slipping a thin slip of aluminum foil (trim it with a siccors)into one of the holes before sliding the pin in. Locktite is the best choice as it has some flexibility to the final set. I have no knowledge of how it would be on the finish. There is an aviation grade locktite.
The brass pin is a superior idea, and you would not have to trim it, just give it a slight bend or bow to apply tension.
As my grandfather, the real German craftsman used to say, "it is just a matter of how ofteen you want to fix it"
regards, heinz
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