Metal needs to be cleaned with isopropyl alcohol before plating.
So the '60 Army has a naval battle scene on it 🤔 so it was issued to the navy? Okay...
All I can saw is wow. Stick to auctions
Let me give you a "nickel" worth of free advice. Stick to making videos about making fun of your customers and leave the work to professional gunsmith.
The reason of the difference in color is because you actually nickeled the cylinder but the rest of the gun was not nickeled, it was Chrome plated, chrome tend to be more white where nickel tend to have a slight yellow hue.