My wife and I purchased a steel, combination-lock box from a local gunshop, in which we will store a handgun. The gun will remain in the box for indefinite periods. The box has a foam cushion on the bottom. Although the salesman indicated the box was suitable for handgun storage, I was wondering whether the foam cushion might retain moisture, and possibly cause pitting or discoloration to the gun's blue finish. I can simply remove the cushion, but was wondering if I'm just being unduly concerned. We live in the midwest, so high humidity levels are not a concern. I'd appreciate any comments or sharing of experiences with a similar situation. Thanks.