I love brass on knives. Gives me an excuse to polish them every month or so. As already said WD40 and a Q tip will clean out and slow down the verdigris on the pins. I have never had any verdigris on knives stored over a long period as long as they weren't in leather. I have seen brass cartridges get practically glued into leather loops by it. I also an old S&W break top that had been loaded for a looong time where the bullets had to be pried out due to verdigris.



