I love this bike but what a pig to clean! And those black anodized wheels...

I had great results with white stains on car paint. Mix half distilled water - half white wine vinegar. Use spray bottle. Spray it a lot to the affected area and leave it for 15 minutes. Wash after that with water and car shampoo. I usually used it only once on affected areas and in some more complicated cases it was enough to repeat once more.

Don’t know if anyone’s mentioned Autosmart G101, it’s very well regarded in the car detailing world, its an all round cleaner, bodywork, engine bays, interiors, different dilution ratio’s for different applications. I’ve found it works well on the bike, removes stains, good for deep cleaning, general cleaning etc. I’m usually very dubious with these miracle all rounders, but this one seems to be the unicorn of the cleaning world.
Do some googling and see what you think, I’ve been cleaning bikes and cars for 45 years and have tried most stuff, this is good.