we've had several come back in to the factory over the past couple of years. All over 12 years old, upto 17 years old. They were all on their original tubes and the hull were all in fantastic condition.
We overhauled a couple, fitted them with anti-wear/non-slip patches on the tubes; put newer seating/consoles on and sent them out again. Considering their age, after a trip to the factory, they left us looking brand new.