[Mark20242SS]

I bought my 24 SS with only 7 miles on it, but the previous owner i discovered must had stored the car with road salt residue on the exhaust. discovered it when it got here when i looked under it. i took it to the car wash and used soap and water, that helped some but still does not look like new. it is not noticeable unless you look under the car.
can a auto repair shop use something to clean the exhaust up while they put it on a lift? was thinking of calling a local shop to see.
the car was originally delivered from chevy to a dealer in minnesota, so maybe it got the salt while it was being trucked there? don't know why nobody ever thought to clean the undercarriage, kinda irritating. otherwise the car is like new. the guy who owned before me was in ohio, but i don't think he ever drove it.
the SS have stainless steel exhaust correct? so should not rust easily?