I would not use a Ziploc plastic bag, even with some rust protector chips. Cloth (like Crown Royal) seems better to me. My one rust experience was in a plastic case. Now my guns live in a safe. The safe is in a basement but two dehumidifiers run all the time. A rechargeable dessicant is in the safe. The guns in the safe are in cloth bags or naked. Everything breathes. The guns are oiled.