I’m currently going down this path with my first putter, a no name hand-me down. One of the keys will be to research what the material of the putter is. Some of the folks out there won’t work with a metal they are unsure of what it is. Rightfully so as they can’t then guarantee how the finish will look and/or hold up.I would like to clean it up as well but have never done any refinishing any tips would be appreciated!
Some folks refinish in cerakote, which is a thin but strong finish akin to powder coating to my understanding. These can come in just about any color to your hearts desire. I’m currently pondering a metallic purple or blue at the moment. If you want any names of folks to go this route let me know.
Best of luck and share photos when done!