ive done a couple of them. they all had a transparent coating on them. i removed the coating on the tank itself down to the base metal. i then carefully removed the coating on the tag that is attached to the tank without removing the painted portion of the tag. after all the coating was removed i then used a dremil with rouge and brought up a lustorious finish on the tank and pump handle. the tag i rubbed up by hand and is still readable and nice. i dont coat it with anything but after it yellows i just bring it back with some wenol or flitz and refrain from touching it. i wear cotton gloves when i handle my brass. the brillance of it lasts for a pretty long time. constant hi humidity yellows it rather quickly and rain ruins it.