vinyl seats

The Bennington boat cover has heated the vinyl on the seat tops causing them to become brittle and crack, according to the people who will repair the seat. I need to remove a seat at a time to have it repaired. This Tritoon has the aluminum undercover and I cannot see if the seats are through...

Recommendations on what to use for cleaning and protecting Bennington seats? Is there a recommendation by Bennington for approved cleaners and if approved cleaners/protectant are not used the warrant is void?

Anyone have opinions on the classic white vinyl? I like the look but haven't seen any boats with it yet.