There is some truth to that...However, my dad bought a new Honda Accord LX circa 1978 (I was a kid so give me year one way or the other)...It rotted out by 1982, only reason I know that is his next car was an 83 Buick Riveria that he kept it until he wanted a decked out new pickup after I got out of college....He went back to GM vehicles and never bought another import....The mechanicals were better, the bodies weren't. I worked for Honda in early 90's and they were still rotting out....Most manufacturers have these issues corrected today.
BTW rustproofing is one of the biggest rust creators that there is...I've never used it on anything. Clogs drain holes and seals in water and salt....I hate that stuff...I haven't been "offered" it on anything I've bought in the last 15 years. I think Ziebart et.al. only does accessories and detailing now.
We use a petrolium grease type rust proofing on our vehicles from a outfit her in town.
Hot weather causes it to run the first 2-3 years and makes a mess by the drain holes.
But our vehicles are holding up great even with all the salt used on the road.
My 1998 chevy is mostly driven in the winter and looking great.
My 2006 chevy truck at work (not rust proofed) is rusting as we sit.
It was 1959 when America was introduced to the "Rusty Automobile".
The 1959 steel strike led to the importation of "quick rusting" foreign steel as we know it today.
Steel strike of 1959 - Wikipedia, the free encyclopedia
I remember my Aunts 1969 convertable XL Ford car rusting out within the first year.
Quality Job #1 wasn't the slogan back then and why all the car companies would ruin their own name with with rusty results is beyond me.
So many rusting autos here in michigan where salt is alpenty on the roads during winter.
I've rode in some that I wonder how the thing is held together while watching the road pass by under my feet.
Decades have gone by and American steel never was never brought back to resolve the problem.
Maybe a strike in the petrolium industry would lead to inexpensive forgien fuels and a return of $.79/gallon at the pump?
The foreign gas might cause the gas tank to rust out , but what the heck.