A pot metal casting, chromed, with an argent "surround" band, chrome "fins" in the middle, with satin black between the fins/serrations?
Mask off what you don't need to be touching! Then you might clean up the black areas. If you can find some pinstriping tape to cover the "fins"/serrations, then re-spray the black areas lightly, several coats. Unmask carefully.
MANY of these painted castings were seldom "show quality", so once you see the direction the spray came from, you can duplicate it. The black is more "flat" than "satin", and certainly NOT shiny. Finding the best satin black will be an adventure. Key thing is to make it "good", but not "too good", other than to get the chrome shiny.
CBODY67