When I picked up the Outback at the body shop after a rear bumper repair (new plastic bumper cover, painting and clear-coating), I mentioned that the next stop was the detailer up the street for the fancy, complete showroom-perfect job. He warned me to tell them not to put any kind of coating, sealer or wax on the new bumper - the clear-coat has to cure for 90 days.
smarts come clear-coated, both the metallics and the MICs. It may be wise to not touch a new-from-factory smart for the first three months.