Anyone who regularly tends to their car should spot potential issues in plenty of time and with a bit of effort avoid them becoming a problem.
One of the best things you can do is wash your own car. Will find things you've never noticed before
^This - any damage can be spotted and dealt with early. One of the first things I buy when I get a new car is a paint touch up kit - often bought before I get the car, to deal with the inevitable stone chips as and when they happen.
With a modern car though, I think I’d be more concerned about mechanical and electrical failures than the likelihood of corrosion.
I imagine it will be with front wings and the big piece of foam on the inside - the foam has caused issues with previous golfs.
This would be the main place i would check first, around the inside and bottom of wings and sils
The mk6 Golf had foam inserts where the front wings were joined to the car body shell near the door hinges. I never had any issues with corrosion on my mk6 in this area (or anywhere else for that matter) in nearly 5 years of ownership, in spite of this foam insert getting wet regularly. Come to think of it, I can’t remember seeing a rusty mk6, so assuming the mk7 body shell and panels get the same level of corrosion protection as the mk6 did, if the mk7 has a similar foam insert piece in the same location, I wouldn’t expect this as major source of corrosion on the mk7.
Corrosion on the sills is usually the result of the flexible anti-stone chip coating becoming damaged around the jacking points as a result of careless use of trolley jacks by tyre fitters. I always check the edges of my sills for damage after having tyres fitted, or after servicing / MOT and repair work to ensure the anti-stone chip coating hasn’t been damaged.
