Are you sure they are clear coated? Easy test, polish with a aluminum wheel cream, I use Mothers, If micro fiber turns black they are not. If it does not turn black they are coated and you have a big project ahead of you. You can use a paint stripper, YouTube it. Be careful, stuff is nasty and will take off any paint it gets on.
To polish use a Mothers powerball in a power drill and polish.
I wipe the paste polish on then use the powerball, wipe clean with microfiber rag only, no terry cloth.
After two wheels wash the powerball, it turns black and starts to trap aluminum particles and will start to leave small scratches.