I've been restoring my grandfather's copper hammers and mallets. Left is what they all looked like before I started. Not finished yet but they're not looking too bad for 70-year-old tools. :
Bluejaye 6 in1 Micro Mini Multifunction Copper Hammer 3 kinds Screwdrivers Hand Tools - - Amazon.com
Vintage Tool Wood & Copper 212 Thor Hammer Co Birmingham No 2 Size Mallet Quality