CNC Mill Mark Removal in Intake Port

Like there's got to be an atomization range, from what a well tuned average performance engine is, to the bleeding edge of what highly developed multi million dollar race teams are doing vs what an highly competent engine builder can do. And how much R&D would it take to go from what an average guy build achieves to what a highly competent build achieves and what kind of power gains are we looking to make with these possible fuel atomization achievements in an average 300-600 hp engines ?