Wasn't sure if this was a "tech" related post or not. I searched under "Wheel cleaning" and found nothing. My 18' Ram has the stock 20" chrome plated plastic permanent wheel covers. I have never cleaned them in 47,000 miles and while they are not filthy, they are long overdue for a cleaning. I bought a citrus based wheel cleaner which did absolutely nothing. What have you had success with that won't damage the coating?

 

I painted mine.