VPI paper is wonderful for use in the bores of long-term stored guns. You just cut a strip and roll it up and slide it down the bore, shotguns and rifles.
Will the guns be stored in a gun safe? If so, 4 years is nothing, IMO. I have guns in my safe that have not been touched in much longer than that, other than to inspect, and absolutely no problem with rust. The Goldenrod works great, even in this coastal plain humidity. Most rust on stored guns is the result of handling and forgetting to wipe it off before putting back in a safe.
SRH
