I obtained this Jack Daniels tin off EBAY a while back and I'm just staring to work on it. What can put on the metal to protect it from further scratches? I'll add more pictures as work progresses.
Not sure. I have several tins to use including one like yours. Never thought finish on them. I think I might be tempted to try some clear coat like they spray on cars. I think you can get it in small cans at an auto parts store.
I've used clear acrylic from a spray can on several metal signs that are displayed outside. The acrylic dries quickly, is very hard and can be had in gloss or flat. Oh yeah, it's fairly cheap.