Your right, they scrubed them clean and then put on the tire dressing
The machines make you mark the tire and rim and then lign up the dots for the best rolling assembly. The machine is special because it holds the rim while it turns the tire to line up the dots. Then the Road Force drum comes down on the tire with 1400 lb/ft to simulate the tire on the road with the wieght of the car on it.
Tony
Thanks, Tony.
I've just sent an email to Hunter 2C if they can give me the name of an outfit up here in this area that has one of their machines. Hopefully they keep records of that sorta thing. (Ya. Right! Good luck to ME! :bored )