I work at ROH wheels australia, on the paint line, ..
Ive powder coated hundreds of wheels, painted, clear coated etc..
if u use the cheap spray paint to spray your wheels they may look good for about 3 months. even if u use a base coat etc....
get them done pro with black powder coat and 2 coats of clear.
thats what Ive done to my wheels and they look very pro and shinny..