[R68GTO]

Working on some little stuff on the car. Sept. of 69 build so my understanding is that it would have a VIN sticker in drivers door jamb. Does this sticker get placed between the two horizontal ribs like my mock-up? Is tire pressure in about the right spot? I also ended up with an MN engine sticker. Did they actually put them on at factory or is that like the caution fan sticker? If correct, where should it be placed. I don't want to "over-sticker" this thing, but if there at factory, then I'll do it.
Also picked up this vintage line lock. Any tips on cleaning these without messing up the gold plating? The front end looks like it was painted black originally, can anyone confirm that?