The cleaners are great, I agree. When I had access to private heated parking with a wash bay I used it about during winter as well. Since I now only have a regular garage the rims do not get special treatment in winter. My current car was bought second hand in the Laurentians. The rims, headlamps, grille and windshield all show the effects of the salt sand mix that is used on the highways there. In spring, I will polish the acrylic headlamp covers and replace the grille. Not much can be done about the windshield (not bad enough to require replacement).
Look forward to hearing about your experience in repainting the rims.
Collelongo (AQ) BMW Club
Sometimes I wonder why I drive BMW's then I drive something else and the doubt disappears.