I'm getting ready to have a Romanian parts kit built into a completed rifle and I would like to retain the "used" look on the parts in the kit. I really want that "well used" look to go along with the used wood furniture in the kit. I understand that I will want to have the receiver coated (builder uses KG coating), but is it necessary to have the other parts coated? What about the barrel? I am planning on using a Polish FB Radom hammer forged barrel. The builder says he can coat just the receiver but it would be more expensive to do that.