The Autosmart fallout remover isn't the best IMO.

Yes, unfortunately, it would have blown out and attached to the side of the vehicle. You will also find it on the back of your car from the airflow running under the car.

CarPro Iron X (the sprayable liquid) is the best for tackling the body panels. A Quartz coating will assist in the removal of contaminants. I would apply a top coat product to help maintain the surface, Gyeon Cure is the top coat that goes with the Gyeon Ceramics.

Give the Iron X Paste a try on the wheels. It may take several applications, but if you see a bleed (solution turning red), then you are getting a result.

Hope they come up. If you need any further help, don't hesitate to ask :)