Orig. Standard Oil Red Crown Porcelain Gas Pump Sign

This is an original Standard Oil Company gas pump sign. It is in decent, but not perfect condition. It measures 12" x 15". It has rust stains on the porcelain at each of the four mounting holes and a few other places around the edges. I don't know if they make a product which can remove these stains. T are four small areas w the porcelain is chipped, as well as, a place on the bottom left at the mounting hole (see photos). The bottom left corner of the sign reads "AD 4653". Bottom right side reads "I. R.-7-52". The sign is still quite glossy and has no other scratches. Sign will be carefully packed. Good luck!