Wax (if you want)
Claying will get the paint real smooth with no contaminates stuck to the paint. The sealant is going yo protect the paint by bonding to it to give you 5-6 months of protection. Waxing with a good quality carnauba wax is going to give you 3-4 months of protection.
I should add that trying to correct and swirl marks or anything like that would be pretty pointless with winter here. Correct the paint in the spring. I will add that I would take the tires off the vehicle and wash the inside of the rims(barrels) too.
Barrels cleaned today