The earlier Winne/Itasca windshield frames do have some reps for rusting but surely not all of them. And while I've been on the RV forums for quite a while, I've not red of any rusting and or distorting enough to cause cracking. That doesn't mean it doesn't happen, it just means I've not seen almost ANY reports of cracking caused by the rusting. Our coach is an '04 Itasca Horizon 36GD with the CAT C-7 330HP and we've had it now for 15 years and 127,000 miles. We've had chip repairs done numerous times and I finally stopped having it done. We had one chip in the passengers side very low and very close to the outside molding.
I was going to do a chip repair on my own just to see if I could do it. Then, one morning, I came out to the coach and that chip, all by itself when the coach was parked for quite some time, just ran up about 11" or so. GREAT! I called a gent who does "crack repair" in windshield and he came up, stop drilled it, sealed things off and said it will never travel on you. Well, that was about 12-13 years ago or so and that crack is now about 1/2 to 2/3 the way up the passengers wind shield. So much for guarantying that it won't run!
It really doesn't bother the CEO when we're traveling and I can almost not see it when I view through it from the drivers seat. We also have many other chips in both sides. I'm not even gonna think about replacing them until I'm either forced by an LEO and receive some sort of "fix-it" (equipment violation to those that are unaware of the other term) ticket. We both figure why drive up the insurance premium by putting in a claim. And don't tell me about all this "waiver" stuff or "automatic" glass replacement stuff by some insurance companies in some states. We inquired about that when we moved to AZ and they knocked that stuff off decades ago. If you want glass replacement here, you pay for it in your premium, period!
I had a real close friend who was in the glass business for decades and he told us when we purchased this coach, he said: "You keep those two stock wind shields in there as long as humanly possible because, they're the best fitting ones you'll ever see. 99.9999% of the replacement windshields will not fit as accurately as the original OEM ones do". Well, after oh, maybe 20-30 chips, some repaired and the rest are there to stay, and one long crack, we're still on the OEM wind shields. A good cleaning and we can see just fine.
Scott