For STORAGE? I use Outers (now Gunslick) Gun Seal. The Outers brand's version is now called Metal Seal. Alternatively, Birchwood Casey Sheath. These offer much better and longer-lasting corrosion-protection than plain 'gun oil,' but don't cost much more. For just sitting in the cabinet for a few days or a week or three, I just wipe 'em down with CLP or whatever 'gun oil' I have at hand. The silicon-impregnated cloths are a good option, too, though I don't think that they and 'gun oil' mix very well, so I try not to use one, then the other, unless I clean/degrease in-between.