Rupp 6" turbine rims

#1
What is the best and safest way to clean Rupp aluminum turbine rims? I would greatly appreciate some assistance from you guys or gals in this area. Thanks a lot in advance for your assistance.
 
#2
Glass bead them and they will look new. Some satin clear will help preserve the look and stop oil from staining too. Or if not too bad try an aluminum cleaner.
 
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