On this 1953 Flying High. There are metal strips attached to the inside of the cabinet, along the sides, even and slightly above the playfield.
This Flying High, it looks like those 2 strips look like they are galvanized. I've seen Gottliebs with those strips in various condition. From chromed, just polished, painted a tan colour, painted a grey colour. (I will attach a photo later tonight.)
"What is the factory installed appearance?"