"FIRE UP".....I wish you would quit posting pics of my wheels, that's plagiarism!
My previous coach had uncoated wheels and once polished out, they were easy to keep nice looking. It was made even easier by keeping them covered when stored at home.
My new coach has a tag axle, adding two more rims to polish. The good news is, they're coated and don't require polishing. The bad news is, they just don't shine like my old rims.
I think the OP is in for a tedious job to remove the coating that is going bad. A call to the manufacturer might produce some ideas on how they would go about stripping them. At minimum, pulling the wheels off would probably make life easier, but is a big job with 22.5's.
I'm with Dennis regarding cleaning the clear coat wheels. It says not to polish them, but they just never look good, except when wet. If someone has a way to make the clear coat wheels look a little better without destroying the coating, I would be glad to hear what you do.