All depends how much the dealer did (bad) before you got the vehicle?
I don't think it's a common prep task that a dealer will start buffing paint with polishers, etc. All they want to do is spend as little time possible to get a vehicle out the door and into the customer's hands.
I would say after a careful wash and dry, inspect the paint-etc visually, and as well the plastic baggie test also wouldn't hurt.
I'm of the "less is more" camp in that I'd let things live a little before resorting to any use of abrasive polishes if one can avoid such.
Because any time you polish, you are removing some paint.
Perhaps for now, sure, WGDGPS-Fuzion, cant go wrong there. Have good wash products on hand, and use good techniques would be my suggestions initially, then go from there.
All the WG products are great, and one might not have a need to resort to either WG TSR or Uber Compound at this point. The mildest in the line-up is the finishing glaze which is not a glaze, but an ultra fine polish to bring out the best high gloss finish.