if i remember correctly, [i am old, so i suffer from CRS biggrin] those keystone wheels are like the cragar SS wheels, a steel hoop and an aluminum center.
if you can get them apart without breaking or loosening the weldable steel inserts that are imbedded into the cast center, you will still have two different materials that will need polishing before replating.
super labor intensive to get done correctly, if at all.
paint or replacement wheels are your only realistic options.
i'm guessing these are 14" wheels, so reproductions are most likely going to be few and far between.
beer