^ my last car was ten years old (when pic was taken)
Never garage kept, driven year round 110K miles.
Never a full repaint. Only the hood when I added the aero kit.
Sold it for twice the blue book value.
Salt is not a big deal if you prep the paint well with each season change.
Actualy acid rain is the bigger culprit. A good post wash sealant or dressing will guard against that. A paint decontamination kit will do wonders for paint that is more than five years old.