I would ask what equipment they are using. Make sure its preferably a center clamp machine which only rubber and plastic touch the wheel. If a "rim-clamp" style machine is used demand that plastic protectors be used and they clamp EXTERNALLY. I see so many guys use rim clamp machines and ram those meat tenderizers into the barrel of the wheel and damage the wheel. It will puncture the clear coat and it only gets worse with time.
If these are GN rims make sure they understand these are reverse drop center wheels which means the wheel is mounted on the changer upside down and the tire comes off from the back. Good luck!