even though this is the back of a sign would this potentially lower the value of a sign? I guess I am asking this as a general question as I, as well as every other collector have this problem. my motive is one to preserve the signs current state and retain its collector value. we all know when rust starts it will continue to eat through till there is no more metal. my inside hanging signs will deteriorate at a slower rate but sometimes the backside is too rough to hang on a nice wall without cleaning them up. I would hate to take a wire brush and just start grinding, throw on primer and paint but, sometimes it takes more than a coat of wax and elbow grease to remove the scaling rust. does the back of a sign really matter in the long run?
