RMccord
My 2001 is out of warranty, I recently had some problems with my rubber roof, and a few other items. Keystone took care of everything. As far as yellowing, I never had a problem, nor do I recall anyone on this site complain. I do take care of my rig by polishing it 2 xs a year. I can imagine if you didn't do anything to maintain the exterior, and if the unit sit's out in the weather all the time there could be a problem. I have yet to see a Montana owner not take care of his rig and at least keep it clean, we are too proud of our rigs to let them go to heck.
For the cracks or bubbling of the fibergalss, there are some problems with cracking out there but I haven't heard of bubbleing. I am pretty sure everyone who has had a problem with cracking had it taken care of by their dealer or Keystone. Maybe someone else will come back with more information.
Good luck with your new unit, I'm sure you will be happy.
Bill
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