I have painted my wheels with a stipple brush. They were soda blasted and spray undercoated at the blaster shop. I purchased a 1/2 gallon can ( 2 liter) can of RustoLume Silver Hammertone. The wheels were stood upside down on a plant holder, the size to fit over the center of the wheel and placed on a rotating base. I the painted the inside of the rim, inside the center, and the back of the spokes with a dabbing or stipple motion. All five insides done turn them over and do the outside.
Because of the method of painting, there are no brush marks. A second coat was applied about a month later, after the first had harden.
Yes it is slow, and time consuming but the finish is worth it. The motor block was done the same way, in a dark green.
A stipple brush is a short hair brush or a normal paint brush with the hair cut short with a pair of sissors.