Smooth (Or Smoothest) Sidewall Radials

Yeah, good luck with that. I just looked at the two pair of pizza cutters i bought recently, and they are covered with letters, numbers, big brand names, and "styling" flourishes.
I guess it doesnt bother me, cause i cant do anything about it.
Diamondback tire does custom redlines on tires that dont normally come with them, and they shave the sidewalls. Maybe they can do something for you.