Polish magnesium wheels???

Hey guys,



Newbie here, with lots of newbie questions. Sorry in advance.



Trying to clean up an 80s Indy car. The wheels are a darkish gray and I assume they are magnesium. They really need to be brightened up. Can they be polished to a reasonably high luster? I just don't know if this can be done to magnesium.



And, can these Goodyear tires still be purchased. I've seen Avon on a bunch of cars lately?



thanks!