I'm honestly not sure what that mark is. I would try wiping it with a 50/50 mix of IPA to remove any possible polish, sealant, wax, etc. left on the surface. If it doesn't remove then I'm more concerned there is some sort of defect in the finish. Normally I would recommend you polish it out, but that may have been the cause of the issue. I would document this issue and bring it to the attention of the detail shop if you are certain it was not a per-existing condition.
Greg @ DI