Good luck . Pleased to see you are using Dinitrol as wax oil is a no no. Just make sure they deal with any rust as the risk is if they don’t they will seal it in and then you will have big problems. Personally I wouldn’t be doing it to a zed unless you are keeping it for the next twenty years. I would be spending the money on other areas of the car but your car your money. I haven’t even done it to my 52 year old 510.