Do your large painted panels with chemical and use a clay mitt on other areas. New cars won't have much on vertical panels but the hood, roof and top edge of fenders will have fallout
It's probably from the water after rinsing the cleaner off causing rust. There is a product that will stop this but I can't recall the name right now. But I don't think the issue is the wheel...
Premiere is good for 4 to 6 months in most cases. I've seen it last as long as 8 to 9 months with a small amount of protection left. Be sure you use a panel wipe before application for best results...
Megs degreaser at 5 to 1 spray and let dwell. Use a plush mf towel soaked in rinseless solution and wipe away grime and salt. Once clean lay a quality sealant on clean paint.
Use a polish on the hood next if you don't have a paint gauge. Not sure how much you have already taken and the hood will be one of the first panels touched by salesman and customers so leave as...
Once a month or 6 weeks use a product that has heavier cleaners rather than ph neutral. This will help release the traffic film (not the same as bonded contamination from brake dust etc). Then move...
Glaze was fighting me on the top and wasnt getting the results I wanted for the effort so dropped the hd speed and using griots fast correcting creme...