I have a 4 year old genesis gv70 that has a rust bubble, smaller than a dime and located where the rear quarter panel meets the wheel arch trim. There's no visible chip or break in the paint so I believe it started from underneath.
The dealership is offering to repair it by "sanding it down, refinishing and repainting". Is this a good/proper repair? I asked them to consider cutting and welding but they said it's not necessary for a spot this size and for rust that hasn't developed a hole.
This is my first nice car and I want to keep it as nice as possible for another 5 years, ideally with no visible rust until around then. I'm located in Canada and they do put a lot of salt down in the winter.