I would wait and wash it after it was quilted. The seams will ravel. I would also hand quilt it. Those are original fabrics and in that place in time, it would have been hand quilted. I would keep it as athentic as possible. I would use a cotton batt and probably muslin for the back. I don't think I would add a border unless you wanted it biger. It's beautiful just the way it is. Binding in a color would just finish it beautifully.